Remove .github/CODEOWNERS (#14781)

It's too spammy and has the opposite of the intended effect: people ignore code
review duties because they assume any code-review-requests are automated and
unrelated to their work. Please just manually request reviews.

.github/CODEOWNERS

@@ -1,35 +0,0 @@
-# project root files (README, Releases, LICENCE, etc)
-/*              @bartlomieju
-
-# CI files
-.github         @bartlomieju @kt3k @piscisaureus  
-
-.devcontainer/  @kitsonk
-
-bench_util/     @AaronO @littledivy
-cli/            @bartlomieju
-cli/ast/        @dsherret @kitsonk
-cli/dts/        @kitsonk
-cli/lsp/        @dsherret @kitsonk
-cli/schemas/    @kitsonk
-cli/tsc/        @kitsonk
-core/           @AaronO @bartlomieju
-docs/           @ry
-ext/            @bartlomieju @crowlKats @lucacasonato @littledivy
-ext/tls/        @piscisaureus
-ext/console/    @kt3k
-ext/crypto/     @lucacasonato @littledivy
-ext/web/        @crowlKats @lucacasonato
-ext/webidl/     @lucacasonato
-ext/webgpu/     @crowlKats @lucacasonato
-ext/ffi/        @littledivy @piscisaureus
-ops/            @littledivy @AaronO
-runtime/        @bartlomieju
-serde_v8/       @AaronO
-test_ffi/       @bartlomieju @littledivy
-test_util/      @bartlomieju
-test_util/wpt/  @lucacasonato
-test_util/      @bartlomieju
-third_party/    @bartlomieju
-tools/          @bartlomieju @dsherret
-tools/wpt/      @lucacasonato