LibWeb: Remove the workaround "Worker Window" from Workers

We can now properly add the prototypes and constructors to the global
object of the Worker's inner realm, so we don't need this window for
anything anymore.

Userland/Libraries/LibWeb/HTML/Scripting/WorkerEnvironmentSettingsObject.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include <AK/URL.h>
+#include <LibWeb/Bindings/DedicatedWorkerExposedInterfaces.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/Forward.h>
 
@@ -33,6 +34,9 @@ public:
         auto host_defined = make<Bindings::HostDefined>(*settings_object, *intrinsics);
         realm->set_host_defined(move(host_defined));
 
+        // FIXME: Shared workers should use the shared worker method
+        Bindings::add_dedicated_worker_exposed_interfaces(realm->global_object(), *realm);
+
         return *settings_object;
     }