Cleanup unnecessary try catch blocks

Author: leolost2605

src/Core/Package.vala

@@ -487,11 +487,7 @@ public class AppCenterCore.Package : Object {
 
     public async void uninstall () throws Error {
         if (state == State.INSTALLED || state == State.UPDATE_AVAILABLE) {
-            try {
-                yield perform_operation (State.REMOVING);
-            } catch (Error e) {
-                throw e;
-            }
+            yield perform_operation (State.REMOVING);
         }
 
         throw new PackageUninstallError.APP_STATE_NOT_INSTALLED (_("Application state not set as installed in AppCenter for package: %s").printf (name));