helix: remove djot grammar (added upstream)

home/.config/helix/languages.toml

@@ -32,15 +32,6 @@ name = "typescript"
 file-types = ["ts"]
 language-servers = ["deno-lsp"]
 
-[[language]]
-name = "djot"
-scope = "source.djot"
-file-types = ["dj"]
-
-[[grammar]]
-name = "djot"
-source = { git = "https://github.com/treeman/tree-sitter-djot", rev = "master" }
-
 [[language]]
 name = "nix"
 formatter = { command = "nixfmt" }