Clean up miscellaneous metafiles

.gitattributes

@@ -3,5 +3,6 @@
 
 # Tell git which symlinks point to files, and which ones point to directories.
 # This is revelevant for Windows only, and requires git >= 2.19.2 to work.
-/v8/build symlink=dir
 **/node_modules/.bin/* symlink=file
+/package.json symlink=file
+/yarn.lock symlink=file

.gitignore

@@ -4,15 +4,7 @@
 /depot_tools/.versions/
 /depot_tools/external_bin/
 
-/rust_crates/git/.cargo-lock-git
-/rust_crates/git/db/
-/rust_crates/registry/cache/
-/rust_crates/registry/index/
-
-v8/buildtools/*/clang-format
-v8/buildtools/*/gn
-v8/buildtools/win/*.exe
-v8/third_party/llvm-build/
-
-# ts-simple-ast should use the same version of typescript
-/node_modules/ts-simple-ast/node_modules
+/v8/buildtools/*/clang-format
+/v8/buildtools/*/gn
+/v8/buildtools/win/*.exe
+/v8/third_party/llvm-build/