Revert "Add a way to toggle inlay hints with modifiers" (#25764)

This PR caused inlay hints to show on every modifiers press

Reverts zed-industries/zed#25752

Release Notes:

- N/A

docs/src/configuring-zed.md

@@ -1517,8 +1517,7 @@ To interpret all `.c` files as C++, files called `MyLockFile` as TOML and files
   "show_other_hints": true,
   "show_background": false,
   "edit_debounce_ms": 700,
-  "scroll_debounce_ms": 50,
-  "toggle_on_modifiers_press": null
+  "scroll_debounce_ms": 50
 }
 ```
 
@@ -1540,22 +1539,6 @@ Use the `lsp` section for the server configuration. Examples are provided in the
 Hints are not instantly queried in Zed, two kinds of debounces are used, either may be set to 0 to be disabled.
 Settings-related hint updates are not debounced.
 
-All possible config values for `toggle_on_modifiers_press` are:
-
-```json
-"inlay_hints": {
-  "toggle_on_modifiers_press": {
-    "control": true,
-    "shift": true,
-    "alt": true,
-    "platform": true,
-    "function": true
-  }
-}
-```
-
-Unspecified values have a `false` value, hints won't be toggled if all the modifiers are `false` or not all the modifiers are pressed.
-
 ## Journal
 
 - Description: Configuration for the journal.