language: Remove embeds support (#46076)

Embeddings have neither been used nor maintained in over a year and
there are currently no plans to use these again any time soon. Hence,
remove support for these here to more clearly indicate that these are
actually not used.

Release Notes:

- N/A

crates/languages/src/python/embedding.scm

@@ -1,9 +0,0 @@
-(class_definition
-    "class" @context
-    name: (identifier) @name
-    ) @item
-
-(function_definition
-    "async"? @context
-    "def" @context
-    name: (_) @name) @item