Remove tsconfig files - they are not part of build process

[ry]

No description provided.

[bartlomieju]

I strongly opt to keep std/tsconfig.test.json - it ensures standard library code is written in such a way it passes strict type checks.

[ry]

@bartlomieju where is that specified?

~/src/deno> grep -R tsconfig.test.json .
./third_party/v8/tools/turbolizer/package.json
9:    "test": "ts-mocha -p tsconfig.test.json test/**/*-test.ts",
~/src/deno>

[bartlomieju]

@ry looks like it got removed during merging of deno_std.
It was used before in CI:
https://github.com/denoland/deno_std/blob/master/.ci/template.common.yml

[piscisaureus]

Tentative LGTM.
I think ensuring that std is compatible with strict mode is pretty important, so please fix that with some priority.

[ry]

Added #3266 to resolve the strict type checking.