Revert "Support CheckJS"

Broken in master.

This reverts commit dd230d520b.

js/compiler.ts

@@ -152,7 +152,6 @@ export class DenoCompiler
   // arguments
   private readonly _options: Readonly<ts.CompilerOptions> = {
     allowJs: true,
-    checkJs: true,
     module: ts.ModuleKind.AMD,
     outDir: "$deno$",
     // TODO https://github.com/denoland/deno/issues/23

tests/error_008_checkjs.js

@@ -1,6 +0,0 @@
-// console.log intentionally misspelled to trigger a type error
-consol.log("hello world!");
-
-// the following error should be ignored and not output to the console
-// @ts-ignore
-const foo = new Foo();

tests/error_008_checkjs.js.out

@@ -1,10 +0,0 @@
-[WILDCARD]/tests/error_008_checkjs.jsILDCARD] - error TS2552: Cannot find name 'consol'. Did you mean 'console'?
-
-ILDCARD] consol.log("hello world!");
-[WILDCARD]~~~~~~
-
-  $asset$/lib.deno_runtime.d.tsILDCARD]
-[WILDCARD]declare const console: console_.Console;
-[WILDCARD]~~~~~~~
-[WILDCARD]'console' is declared here.
-

tsconfig.json

@@ -1,9 +1,7 @@
 {
   "compilerOptions": {
-    "allowJs": true,
     "allowUnreachableCode": false,
     "baseUrl": ".",
-    "checkJs": true,
     "module": "esnext",
     "moduleResolution": "node",
     "noImplicitReturns": true,

website/app.js

@@ -154,12 +154,10 @@ function gen2(
     };
   }
 
-  // @ts-ignore
   c3.generate({
     bindto: id,
     size: {
       height: 300,
-      // @ts-ignore
       width: window.chartWidth || 375 // TODO: do not use global variable
     },
     data: {
@@ -203,7 +201,6 @@ export async function drawChartsFromBenchmarkData(dataUrl) {
   const sha1ShortList = sha1List.map(sha1 => sha1.substring(0, 6));
 
   const viewCommitOnClick = _sha1List => d => {
-    // @ts-ignore
     window.open(
       `https://github.com/denoland/deno/commit/${_sha1List[d["index"]]}`
     );
@@ -233,7 +230,6 @@ export async function drawChartsFromBenchmarkData(dataUrl) {
  */
 export async function drawChartsFromTravisData() {
   const viewPullRequestOnClick = _prNumberList => d => {
-    // @ts-ignore
     window.open(
       `https://github.com/denoland/deno/pull/${_prNumberList[d["index"]]}`
     );