Merge #6984

6984: Remove TextMate grammar r=dustypomerleau a=lnicola

Closes #6267

This is now included upstream in VS Code.

Co-authored-by: Laurențiu Nicola <lnicola@dend.ro>

editors/code/.vscodeignore

@@ -4,6 +4,5 @@
 !package.json
 !package-lock.json
 !ra_syntax_tree.tmGrammar.json
-!rust.tmGrammar.json
 !icon.png
 !README.md

editors/code/package.json

@@ -748,11 +748,6 @@
             }
         ],
         "grammars": [
-            {
-                "language": "rust",
-                "scopeName": "source.rust",
-                "path": "rust.tmGrammar.json"
-            },
             {
                 "language": "ra_syntax_tree",
                 "scopeName": "source.ra_syntax_tree",