Remove Deno.build.args feature

This is a minor feature which complicates the build signifigantly.
Removing to ease refactoring the build system:
denoland#2608

cli/BUILD.gn

@@ -244,10 +244,6 @@ bundle("main_bundle") {
   deps = [
     ":deno_runtime_declaration",
     ":msg_ts",
-    ":write_gn_args",
-  ]
-  data = [
-    "$target_gen_dir/gn_args.txt",
   ]
 }
 
@@ -257,10 +253,6 @@ bundle("compiler_bundle") {
   deps = [
     ":deno_runtime_declaration",
     ":msg_ts",
-    ":write_gn_args",
-  ]
-  data = [
-    "$target_gen_dir/gn_args.txt",
   ]
 }
 

js/build.ts

@@ -12,9 +12,6 @@ export interface BuildInfo {
 
   /** The operating system. */
   os: OperatingSystem;
-
-  /** The arguments passed to GN during build. See `gn help buildargs`. */
-  args: string;
 }
 
 // 'build' is injected by rollup.config.js at compile time.
@@ -23,8 +20,7 @@ export const build: BuildInfo = {
   /* eslint-disable-next-line @typescript-eslint/no-explicit-any */
   arch: `ROLLUP_REPLACE_ARCH` as any,
   /* eslint-disable-next-line @typescript-eslint/no-explicit-any */
-  os: `ROLLUP_REPLACE_OS` as any,
-  args: `ROLLUP_REPLACE_GN_ARGS`
+  os: `ROLLUP_REPLACE_OS` as any
 };
 
 // TODO(kevinkassimo): deprecate Deno.platform

js/build_test.ts

@@ -8,7 +8,3 @@ test(function buildInfo(): void {
   assert(arch === "x64");
   assert(os === "mac" || os === "win" || os === "linux");
 });
-
-test(function buildGnArgs(): void {
-  assert(Deno.build.args.length > 100);
-});

rollup.config.js

@@ -18,7 +18,6 @@ const typescriptPath = path.resolve(
   __dirname,
   "third_party/node_modules/typescript/lib/typescript.js"
 );
-const gnArgs = fs.readFileSync("gen/cli/gn_args.txt", "utf-8").trim();
 
 // We will allow generated modules to be resolvable by TypeScript based on
 // the current build path
@@ -190,8 +189,7 @@ export default function makeConfig(commandOptions) {
       replace({
         ROLLUP_REPLACE_TS_VERSION: typescript.version,
         ROLLUP_REPLACE_ARCH: archNodeToDeno[process.arch],
-        ROLLUP_REPLACE_OS: osNodeToDeno[process.platform],
-        ROLLUP_REPLACE_GN_ARGS: gnArgs
+        ROLLUP_REPLACE_OS: osNodeToDeno[process.platform]
       }),
 
       // would prefer to use `rollup-plugin-virtual` to inject the empty module, but there