Remove mistaken .in_chans attr set in classifier class

Author: rwightman

timm/models/repvit.py

@@ -292,7 +292,6 @@ def __init__(
         self.distillation = distillation
         self.distilled_training = False
         self.num_classes = num_classes
-        self.in_chans = in_chans
         if distillation:
             self.head_dist = NormLinear(dim, num_classes, **dd) if num_classes > 0 else nn.Identity()