Remove git_commit syntax highlighting from core Zed (#9025)

Fallback to extension
https://github.com/zed-industries/extensions/pull/307

Release Notes:

- Remove git_commit syntax highlighting from Zed core, `git-firefly` extension replaced that

Co-authored-by: William Desportes <williamdes@wdes.fr>
Co-authored-by: Kirill Bulatov <mail4score@gmail.com>
Co-authored-by: Marshall Bowers <1486634+maxdeviant@users.noreply.github.com>

crates/languages/src/gitcommit/config.toml

@@ -1,12 +0,0 @@
-name = "Git Commit"
-grammar = "git_commit"
-path_suffixes = [
-  # Refer to https://github.com/neovim/neovim/blob/master/runtime/lua/vim/filetype.lua#L1286-L1290
-  "TAG_EDITMSG",
-  "MERGE_MSG",
-  "COMMIT_EDITMSG",
-  "NOTES_EDITMSG",
-  "EDIT_DESCRIPTION",
-]
-line_comments = ["#"]
-brackets = []

crates/languages/src/gitcommit/highlights.scm

@@ -1,34 +0,0 @@
-(comment) @comment
-(generated_comment) @comment
-(title) @text.title
-(text) @text
-(branch) @text.reference
-(change) @keyword
-(filepath) @text.uri
-(arrow) @punctuation.delimiter
-
-(subject) @text.title
-(subject (overflow) @text)
-(prefix (type) @keyword)
-(prefix (scope) @parameter)
-(prefix [
-    "("
-    ")"
-    ":"
-] @punctuation.delimiter)
-(prefix [
-    "!"
-] @punctuation.special)
-
-(message) @text
-
-(trailer (token) @keyword)
-(trailer (value) @text)
-
-(breaking_change (token) @text.warning)
-(breaking_change (value) @text)
-
-(scissor) @comment
-(subject_prefix) @keyword
-
-(ERROR) @error

crates/languages/src/gitcommit/injections.scm

@@ -1,8 +0,0 @@
-((diff) @injection.content
- (#set! injection.combined)
- (#set! injection.language "diff"))
-
-((rebase_command) @injection.content
- (#set! injection.combined)
- (#set! injection.language "git_rebase"))
-