Enable clippy::needless_question_mark (#8759)

This PR enables the
[`clippy::needless_question_mark`](https://rust-lang.github.io/rust-clippy/master/index.html#/needless_question_mark)
rule and fixes the outstanding violations.

Release Notes:

- N/A

crates/workspace/src/persistence.rs

@@ -622,11 +622,11 @@ impl WorkspaceDb {
     }
 
     fn get_items(&self, pane_id: PaneId) -> Result<Vec<SerializedItem>> {
-        Ok(self.select_bound(sql!(
+        self.select_bound(sql!(
             SELECT kind, item_id, active FROM items
             WHERE pane_id = ?
                 ORDER BY position
-        ))?(pane_id)?)
+        ))?(pane_id)
     }
 
     fn save_items(

crates/workspace/src/workspace.rs

@@ -1243,11 +1243,10 @@ impl Workspace {
                 }
             }
 
-            Ok(this
-                .update(&mut cx, |this, cx| {
-                    this.save_all_internal(SaveIntent::Close, cx)
-                })?
-                .await?)
+            this.update(&mut cx, |this, cx| {
+                this.save_all_internal(SaveIntent::Close, cx)
+            })?
+            .await
         })
     }