Revert "Keep selection in SwitchToHelixNormalMode (#41583)" (#42892)

Closes #ISSUE

Release Notes:

- Fixes vim "go to definition" making a selection

crates/workspace/src/searchable.rs

@@ -104,7 +104,6 @@ pub trait SearchableItem: Item + EventEmitter<SearchEvent> {
         &mut self,
         index: usize,
         matches: &[Self::Match],
-        collapse: bool,
         window: &mut Window,
         cx: &mut Context<Self>,
     );
@@ -186,7 +185,6 @@ pub trait SearchableItemHandle: ItemHandle {
         &self,
         index: usize,
         matches: &AnyVec<dyn Send>,
-        collapse: bool,
         window: &mut Window,
         cx: &mut App,
     );
@@ -279,13 +277,12 @@ impl<T: SearchableItem> SearchableItemHandle for Entity<T> {
         &self,
         index: usize,
         matches: &AnyVec<dyn Send>,
-        collapse: bool,
         window: &mut Window,
         cx: &mut App,
     ) {
         let matches = matches.downcast_ref().unwrap();
         self.update(cx, |this, cx| {
-            this.activate_match(index, matches.as_slice(), collapse, window, cx)
+            this.activate_match(index, matches.as_slice(), window, cx)
         });
     }