docs: format error in ABCI++ specs under commit and listsnapshots sec…

…tion (#2536)

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Closes #2535
---

#### PR checklist

- [ ] Tests written/updated
- [ ] Changelog entry added in `.changelog` (we use
[unclog](https://github.com/informalsystems/unclog) to manage our
changelog)
- [ ] Updated relevant documentation (`docs/` or `spec/`) and code
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(cherry picked from commit e0ace49)

spec/abci/abci++_methods.md

@@ -161,9 +161,6 @@ title: Methods
 
 * **Request**:
 
-    | Name   | Type  | Description                        | Field Number |
-    |--------|-------|------------------------------------|--------------|
-
     Commit signals the application to persist application state. It takes no parameters.
 
 * **Response**:
@@ -185,9 +182,6 @@ title: Methods
 
 * **Request**:
 
-    | Name | Type | Description | Field Number |
-    |------|------|-------------|--------------|
-
     Empty request asking the application for a list of snapshots.
 
 * **Response**: