Remove incorrect documentation for language-specific theme overrides (#17894)

Peter Tripp created 

Zed does not support this, the documentation was added in error. And if it were supported, the key would be `experimental.theme_overrides` not `theme_overrides`.

Change summary

docs/src/configuring-languages.md | 26 +++-----------------------
1 file changed, 3 insertions(+), 23 deletions(-)

Detailed changes

docs/src/configuring-languages.md 🔗 

@@ -295,7 +295,9 @@ Zed offers customization options for syntax highlighting and themes, allowing yo
 
 ### Customizing Syntax Highlighting
 
-Zed uses Tree-sitter grammars for syntax highlighting. Override the default highlighting using the `experimental.theme_overrides` setting:
+Zed uses Tree-sitter grammars for syntax highlighting. Override the default highlighting using the `experimental.theme_overrides` setting.
+
+This example makes comments italic and changes the color of strings:
 
 ```json
 "experimental.theme_overrides": {
@@ -310,28 +312,6 @@ Zed uses Tree-sitter grammars for syntax highlighting. Override the default high
 }
 ```
 
-This example makes comments italic and changes the color of strings.
-
-### Language-Specific Theme Overrides
-
-Apply theme overrides for specific languages:
-
-```json
-"languages": {
-  "Python": {
-    "theme_overrides": {
-      "syntax": {
-        "function": {
-          "color": "#0000FF"
-        }
-      }
-    }
-  }
-}
-```
-
-This configuration changes the color of function names in Python files.
-
 ### Selecting and Customizing Themes
 
 Change your theme: