Cleanups preparing for WindowContext refactor (#22475)

* Remove unnecessary WindowContext and ViewContext '_ lifetimes

* Removed some cases where WindowContext has a different name than `cx`.

Release Notes:

- N/A

crates/terminal_view/src/persistence.rs

@@ -143,7 +143,7 @@ fn populate_pane_items(
     pane: &mut Pane,
     items: Vec<View<TerminalView>>,
     active_item: Option<u64>,
-    cx: &mut ViewContext<'_, Pane>,
+    cx: &mut ViewContext<Pane>,
 ) {
     let mut item_index = pane.items_len();
     for item in items {