modules: remove harmful forwarding init methods

There is no reason for these inititializers to exist, all they do is
defer to the parent initializer. Worse, since they are not type
annotated thy prevent the parent type annotations from being used

mesonbuild/modules/__init__.py

@@ -198,21 +198,16 @@ class ModuleReturnValue:
         self.new_objects = new_objects
 
 class GResourceTarget(build.CustomTarget):
-    def __init__(self, name, subdir, subproject, kwargs):
-        super().__init__(name, subdir, subproject, kwargs)
+    pass
 
 class GResourceHeaderTarget(build.CustomTarget):
-    def __init__(self, name, subdir, subproject, kwargs):
-        super().__init__(name, subdir, subproject, kwargs)
+    pass
 
 class GirTarget(build.CustomTarget):
-    def __init__(self, name, subdir, subproject, kwargs):
-        super().__init__(name, subdir, subproject, kwargs)
+    pass
 
 class TypelibTarget(build.CustomTarget):
-    def __init__(self, name, subdir, subproject, kwargs):
-        super().__init__(name, subdir, subproject, kwargs)
+    pass
 
 class VapiTarget(build.CustomTarget):
-    def __init__(self, name, subdir, subproject, kwargs):
-        super().__init__(name, subdir, subproject, kwargs)
+    pass