Remove invalid node queries from highlights.scm

comment_content, raw_content, and embedded_content are regex
patterns that become anonymous nodes in tree-sitter. Remove
them from queries to fix "Invalid node type" errors.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

queries/highlights.scm

@@ -3,15 +3,12 @@
 ; Comments
 (html_comment) @comment
 (template_comment) @comment
-(comment_content) @comment
 
 ; Raw blocks (verbatim content)
 (raw_block) @string.special
-(raw_content) @string.special
 
 ; Embedded language
 (embedded_language) @string.special
-(embedded_content) @string.special
 (language_name) @label
 
 ; Keywords