Removed lhrwgt variables from Z process. Closes AGENE-1579.

Former-commit-id: 66fe836a4f2e586a91b6c8f7250279e4c3890c18

Generators/PowhegControl/python/processes/powheg/Z.py

@@ -61,10 +61,6 @@ class Z(PowhegV1):
         self.add_keyword("iymax")
         self.add_keyword("lhans1", self.default_PDFs)
         self.add_keyword("lhans2", self.default_PDFs)
-        self.add_keyword("lhrwgt_descr")
-        self.add_keyword("lhrwgt_group_combine")
-        self.add_keyword("lhrwgt_group_name")
-        self.add_keyword("lhrwgt_id")
         self.add_keyword("manyseeds")
         self.add_keyword("mass_high", 2.0 * self.parameters_by_name("beam_energy")[0].value)
         self.add_keyword("mass_low", 60.0)