Remove iterator API. Remove TopN. Remove values API from PersistentMap

[MaksymZavershynskyi]

Reviving this old PR: nearprotocol/near-runtime-ts#99

@willemneal CI fails because of the injected code:

--baseDir /home/runner/work/near-sdk-as/near-sdk-as/bindgen --runtime none --transform /home/runner/work/near-sdk-as/near-sdk-as/bindgen ../assembly/__tests__/bindgen/test.ts --binaryFile out/test.wasm --textFile out/test.wat --debug --measure --runPasses inlining-optimizing,dce
INFO AS210: Expression is never 'null'.

     let encoder = (_encoder == null ? new JSONEncoder() : _encoder)!;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 in ../assembly/__tests__/bindgen/model.ts(54,18)

INFO AS210: Expression is never 'null'.

     let encoder = (_encoder == null ? new JSONEncoder() : _encoder)!;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[willemneal]

Above is just a warning and I'll fix it in the next major version.

However, the error was the following

[Error] There was a compilation error when trying to create the wasm binary for file: assembly/__tests__/runtime.spec.ts.
Error [AssertionError]: assertion failed
    at t.assert (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:576726)
    at m.compileAssignment (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:283111)
    at m.compileBinaryExpression (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:261304)
    at m.compileExpression (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:248552)
    at m.compileExpressionStatement (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:236513)
    at m.compileStatement (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:232366)
    at m.compileStatements (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:233373)
    at m.compileFunctionBody (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:222983)
    at m.compileFunction (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:221953)
    at m.compileFunctionExpression (/home/runner/work/near-sdk-as/near-sdk-as/node_modules/assemblyscript/dist/assemblyscript.js:7:309419) {
  message: 'assertion failed'

I really hate these compiler errors; I will take a look soon and make an issue upstream if I can.

[MaksymZavershynskyi]

[Error] There was a compilation error when trying to create the wasm binary for file: assembly/tests/runtime.spec.ts.

@willemneal can you tell what causes this error? Cause I just removed some of the tests and I am not sure why is it not compiling anymore.

[willemneal]

You forgot to update runtime.spec.ts, which should have been in the runtime folder.

[MaksymZavershynskyi]

@willemneal Thank you for fixing it! Is it good to merge?