Revert "inline completion: Add syntax highlighting for edit prediction (#23361)" (#23829)

This reverts commit 3dee32c43d.

Release Notes:

- N/A

crates/language/src/syntax_map.rs

@@ -263,7 +263,7 @@ impl SyntaxSnapshot {
         self.layers.is_empty()
     }
 
-    pub fn interpolate(&mut self, text: &BufferSnapshot) {
+    fn interpolate(&mut self, text: &BufferSnapshot) {
         let edits = text
             .anchored_edits_since::<(usize, Point)>(&self.interpolated_version)
             .collect::<Vec<_>>();