Revert "Support CheckJS" [Merge on Approval]

[ry]

This reverts commit 2cfa608.

Broken on windows again -
https://ci.appveyor.com/project/deno/deno/builds/19771566

C:\deno\out\release\deno.exe C:\deno\tests\error_008_checkjs.js --reload
Expected output does not match actual.
Expected: [WILDCARD]/tests/error_008_checkjs.js�[WILDCARD] - error TS2552: Cannot find name 'consol'. Did you mean 'console'?
�[WILDCARD] consol.log("hello world!");
[WILDCARD]~~~~~~
  $asset$/lib.deno_runtime.d.ts�[WILDCARD]
[WILDCARD]declare const console: console_.Console;
[WILDCARD]~~~~~~~
[WILDCARD]'console' is declared here.
Actual:   ReferenceError: consol is not defined
    at eval (file:///C:/deno/tests/error_008_checkjs.js:2:1)
    at DenoCompiler.eval [as _globalEval] (<anonymous>)
    at DenoCompiler._gatherDependencies (deno/js/compiler.ts:220:10)
    at DenoCompiler.run (deno/js/compiler.ts:558:12)
    at denoMain (deno/js/main.ts:96:12)
    at deno_main.js:1:1

Previously: #1068, #1070, #1084

[ry]

Closing this because master is green after #1095

[kitsonk]

Finally once it wasn't my fault! 😁