Revert "Capture shorthand_field_initializer and modules in Rust highlights (#35842)" (#36880)

This PR reverts https://github.com/zed-industries/zed/pull/35842, as it
broke the syntax highlighting for `crate`:

### Before Revert

<img width="367" height="70" alt="Screenshot 2025-08-25 at 11 29 50 AM"
src="https://github.com/user-attachments/assets/ce9b8b59-4e89-43ed-84c7-95c0156b9168"
/>

### After Revert

<img width="353" height="69" alt="Screenshot 2025-08-25 at 11 32 17 AM"
src="https://github.com/user-attachments/assets/b6df5a21-64db-4abf-aa76-f085236da0c4"
/>

This reverts commit 896a35f7be.

Release Notes:

- Reverted https://github.com/zed-industries/zed/pull/35842.

crates/languages/src/rust/highlights.scm

@@ -6,9 +6,6 @@
 (self) @variable.special
 (field_identifier) @property
 
-(shorthand_field_initializer
-  (identifier) @property)
-
 (trait_item name: (type_identifier) @type.interface)
 (impl_item trait: (type_identifier) @type.interface)
 (abstract_type trait: (type_identifier) @type.interface)
@@ -41,20 +38,11 @@
     (identifier) @function.special
     (scoped_identifier
       name: (identifier) @function.special)
-  ]
-  "!" @function.special)
+  ])
 
 (macro_definition
   name: (identifier) @function.special.definition)
 
-(mod_item
-  name: (identifier) @module)
-
-(visibility_modifier [
-  (crate) @keyword
-  (super) @keyword
-])
-
 ; Identifier conventions
 
 ; Assume uppercase names are types/enum-constructors
@@ -127,7 +115,9 @@
   "where"
   "while"
   "yield"
+  (crate)
   (mutable_specifier)
+  (super)
 ] @keyword
 
 [
@@ -199,7 +189,6 @@
 operator: "/" @operator
 
 (lifetime) @lifetime
-(lifetime (identifier) @lifetime)
 
 (parameter (identifier) @variable.parameter)