perf(markdown): remove expensive latex query

Author: TheLeoP

after/queries/markdown/matchup.scm

@@ -3,4 +3,4 @@
 ;; ====================
 (fenced_code_block
   (fenced_code_block_delimiter) @open.code_fence
-  (fenced_code_block_delimiter) @close.code_fence) @scope.code_fence
+  (fenced_code_block_delimiter) @close.code_fence) @scope.code_fence

after/queries/markdown_inline/matchup.scm

@@ -27,10 +27,3 @@
 (strikethrough
   (emphasis_delimiter) @open.strikethrough
   (emphasis_delimiter) @close.strikethrough) @scope.strikethrough
-
-;; ===========================
-;; LaTeX math ($...$ / $$...$$)
-;; ===========================
-(latex_block
-  (latex_span_delimiter) @open.math
-  (latex_span_delimiter) @close.math) @scope.math