Revert "LibWeb: Allow bypassing transient activation checks for tests"

This reverts commit e52c30cbd5.

It's highly possible that this test was flaky on CI due to mixing units
of seconds and milliseconds in the transient activation calculation.
Revert the workaround for that commit in an attempt to avoid needless
ad-hoc behavior.

Userland/Libraries/LibWeb/Internals/Internals.cpp

@@ -89,4 +89,10 @@ void Internals::wheel(double x, double y, double delta_x, double delta_y)
     page.handle_mousewheel({ x, y }, { x, y }, 0, 0, 0, delta_x, delta_y);
 }
 
+WebIDL::ExceptionOr<bool> Internals::dispatch_user_activated_event(DOM::EventTarget& target, DOM::Event& event)
+{
+    event.set_is_trusted(true);
+    return target.dispatch_event(event);
+}
+
 }