Remove properties that were true since abstract-level@1

Author: vweevers

README.md

@@ -134,40 +134,6 @@ Do iterators support [`seek(..)`](https://github.com/Level/abstract-level/#itera
 
 </details>
 
-#### `clear` (boolean)
-
-Does the database support `db.clear()`? Always true since `abstract-level@1`.
-
-<details>
-<summary>Support matrix</summary>
-
-See also [Level/community#79](https://github.com/Level/community/issues/79).
-
-| Module                          | Support | Optimized |
-| :------------------------------ | :------ | :-------- |
-| `abstract-level` and dependents | ✅ 1.0.0 | ✅ 1.0.0   |
-| `abstract-leveldown`            | ✅ 6.1.0 | n/a       |
-| `leveldown`                     | ✅ 5.2.0 | ✅ 6.0.3   |
-| `rocksdb`                       | ✅ 4.1.0 | ✅ 5.2.0   |
-| `memdown`                       | ✅ 5.0.0 | ✅ 6.1.1   |
-| `level-js`                      | ✅ 5.0.0 | ✅ 5.0.0   |
-| `encoding-down`                 | ✅ 6.2.0 | n/a       |
-| `deferred-leveldown`            | ✅ 5.2.0 | n/a       |
-| `levelup`                       | ✅ 4.2.0 | n/a       |
-| `level-packager`                | ✅ 5.0.3 | n/a       |
-| `level`                         | ✅ 6.0.0 | ✅ 7.0.1   |
-| `level-mem`                     | ✅ 5.0.1 | ✅ 6.0.1   |
-| `level-rocksdb`                 | ✅ 5.0.0 | ✅ 5.0.0   |
-| `subleveldown`                  | ✅ 4.2.1 | ✅ 4.2.1   |
-| `multileveldown`                | ✅ 5.0.0 | ✅ 5.0.0   |
-| `level-party`                   | ✅ 5.1.0 | ✅ 5.1.0   |
-
-</details>
-
-### `status` (boolean)
-
-Does the database have a [`status`](https://github.com/Level/abstract-level/#dbstatus) property? Always true since `abstract-level@1`.
-
 ### `deferredOpen` (boolean)
 
 Can operations like `db.put()` be called without explicitly opening the db? Like so:
@@ -199,35 +165,6 @@ Does `db.open()` support these options?
 
 </details>
 
-### `promises` (boolean)
-
-Do all database methods (that don't otherwise have a return value) support promises, in addition to callbacks? Such that, when a callback argument is omitted, a promise is returned:
-
-```js
-db.put('key', 'value', callback)
-await db.put('key', 'value')
-```
-
-Always true since `abstract-level@1`.
-
-<details>
-<summary>Support matrix</summary>
-
-| Module                              | Support              |
-| :---------------------------------- | :------------------- |
-| `abstract-level` and dependents     | ✅                    |
-| `abstract-leveldown` and dependents | ❌ (except iterators) |
-| `levelup`                           | ✅                    |
-| `level-packager`                    | ✅                    |
-| `level`                             | ✅                    |
-| `level-mem`                         | ✅                    |
-| `level-rocksdb`                     | ✅                    |
-| `subleveldown`                      | ✅                    |
-| `multileveldown`                    | ✅                    |
-| `level-party`                       | ✅                    |
-
-</details>
-
 ### `events` (object)
 
 Which events does the database emit, as indicated by nested properties? For example:
@@ -314,49 +251,6 @@ _This matrix lists which encodings are supported as indicated by e.g. `db.suppor
 
 </details>
 
-### `getMany` (boolean)
-
-Does the database support `db.getMany()`? Always true since `abstract-level@1`.
-
-<details>
-<summary>Support matrix</summary>
-
-| Module                          | Support |
-| :------------------------------ | :------ |
-| `abstract-level` and dependents | ✅ 1.0.0 |
-| `abstract-leveldown`            | ✅ 7.2.0 |
-| `leveldown`                     | ✅ 6.1.0 |
-| `rocksdb`                       | ✅ 5.2.0 |
-| `memdown`                       | ✅       |
-| `level-js`                      | ✅ 6.1.0 |
-| `encoding-down`                 | ✅ 7.1.0 |
-| `deferred-leveldown`            | ✅ 7.0.0 |
-| `levelup`                       | ✅ 5.1.0 |
-| `level`                         | ✅ 7.0.1 |
-| `level-mem`                     | ✅ 6.0.1 |
-| `level-rocksdb`                 | ✅ 5.0.0 |
-| `subleveldown`                  | ✅ 6.0.0 |
-| `multileveldown`                | ✅ 5.0.0 |
-| `level-party`                   | ✅ 5.1.0 |
-
-</details>
-
-### `keyIterator` (boolean)
-
-Does the database have a `keys([options])` method that returns a key iterator? Always true since `abstract-level@1`.
-
-### `valueIterator` (boolean)
-
-Does the database have a `values([options])` method that returns a key iterator? Always true since `abstract-level@1`.
-
-### `iteratorNextv` (boolean)
-
-Do iterators have a `nextv(size[, options][, callback])` method? Always true since `abstract-level@1`.
-
-### `iteratorAll` (boolean)
-
-Do iterators have a `all([options][, callback])` method? Always true since `abstract-level@1`.
-
 ### `additionalMethods` (object)
 
 Declares support of additional methods, that are not part of the `abstract-level` interface. In the form of:

index.d.ts

@@ -32,47 +32,6 @@ export interface IManifest {
    */
   seek: boolean
 
-  /**
-   * Does the database support `db.clear()`? Always true since `abstract-level@1`.
-   */
-  clear: boolean
-
-  /**
-   * Does the database support `db.getMany()`? Always true since `abstract-level@1`.
-   */
-  getMany: boolean
-
-  /**
-   * Does the database have a `keys([options])` method that returns a key iterator?
-   * Always true since `abstract-level@1`.
-   */
-  keyIterator: boolean
-
-  /**
-   * Does the database have a `values([options])` method that returns a key iterator?
-   * Always true since `abstract-level@1`.
-   */
-  valueIterator: boolean
-
-  /**
-   * Do iterators have a `nextv(size[, options][, callback])` method? Always true since
-   * `abstract-level@1`.
-   */
-  iteratorNextv: boolean
-
-  /**
-   * Do iterators have a `all([options][, callback])` method? Always true since
-   * `abstract-level@1`.
-   */
-  iteratorAll: boolean
-
-  /**
-   * Does the database have a
-   * [`status`](https://github.com/Level/abstract-level/#dbstatus) property? Always true
-   * since `abstract-level@1`.
-   */
-  status: boolean
-
   /**
    * Does `db.open()` and the database constructor support this option?
    */
@@ -95,20 +54,6 @@ export interface IManifest {
    */
   deferredOpen: boolean
 
-  /**
-   * Do all database methods (that don't otherwise have a return value) support promises,
-   * in addition to callbacks? Such that, when a callback argument is omitted, a promise
-   * is returned:
-   *
-   * ```js
-   * db.put('key', 'value', callback)
-   * await db.put('key', 'value')
-   * ```
-   *
-   * Always true since `abstract-level@1`.
-   */
-  promises: boolean
-
   /**
    * Does database have the methods `createReadStream`, `createKeyStream` and
    * `createValueStream`, following the API documented in `levelup`? For `abstract-level`

index.js

@@ -7,17 +7,9 @@ exports.supports = function supports (...manifests) {
     snapshots: manifest.snapshots || false,
     permanence: manifest.permanence || false,
     seek: manifest.seek || false,
-    clear: manifest.clear || false,
-    getMany: manifest.getMany || false,
-    keyIterator: manifest.keyIterator || false,
-    valueIterator: manifest.valueIterator || false,
-    iteratorNextv: manifest.iteratorNextv || false,
-    iteratorAll: manifest.iteratorAll || false,
-    status: manifest.status || false,
     createIfMissing: manifest.createIfMissing || false,
     errorIfExists: manifest.errorIfExists || false,
     deferredOpen: manifest.deferredOpen || false,
-    promises: manifest.promises || false,
     streams: manifest.streams || false,
     encodings: Object.assign({}, manifest.encodings),
     events: Object.assign({}, manifest.events),