Fix <Extensions> not building (#4588)

src/renderer/components/+extensions/extensions.tsx

@@ -68,10 +68,6 @@ class NonInjectedExtensions extends React.Component<Dependencies> {
     makeObservable(this);
   }
 
-  get dependencies() {
-    return this.props.dependencies;
-  }
-
   componentDidMount() {
     disposeOnUnmount(this, [
       reaction(() => this.props.userExtensions.get().length, (curSize, prevSize) => {