assistant: Remove meta description from quote selection tooltip (#16412)

The original idea was for the keybinding to be within the description, but given it's already inline with the title, I figure we don't need this anymore—cleaning it up a bit!

--- 

Release Notes:

- N/A

crates/assistant/src/assistant_panel.rs

@@ -3745,17 +3745,15 @@ impl Render for ContextEditor {
                                         })
                                         .tooltip(move |cx| {
                                             cx.new_view(|cx| {
-                                                Tooltip::new("Insert Selection")
+                                                Tooltip::new("Insert Selection").key_binding(
-                                                    .meta("Press to quote via keyboard")
+                                                    focus_handle.as_ref().and_then(|handle| {
-                                                    .key_binding(focus_handle.as_ref().and_then(
-                                                        |handle| {
                                                         KeyBinding::for_action_in(
                                                             &QuoteSelection,
                                                             &handle,
                                                             cx,
                                                         )
-                                                        },
+                                                    }),
-                                                    ))
+                                                )
                                             })
                                             .into()
                                         }),