Cleanup unused member with old name

Author: rwightman

models/genmobilenet.py

@@ -648,7 +648,6 @@ def __init__(self, block_args, num_classes=1000, in_chans=3, stem_size=32, num_f
                  folded_bn=False, padding_same=False):
         super(GenMobileNet, self).__init__()
         self.num_classes = num_classes
-        self.depth_multiplier = channel_multiplier
         self.drop_rate = drop_rate
         self.act_fn = act_fn
         self.num_features = num_features