Fix LoadStreams final frame bug (#4387)

Co-authored-by: Nadim Bou Alwan <64587372+nadinator@users.noreply.github.com>

ultralytics/nn/modules/conv.py

@@ -175,15 +175,6 @@ class RepConv(nn.Module):
         kernelid, biasid = self._fuse_bn_tensor(self.bn)
         return kernel3x3 + self._pad_1x1_to_3x3_tensor(kernel1x1) + kernelid, bias3x3 + bias1x1 + biasid
 
-    def _avg_to_3x3_tensor(self, avgp):
-        channels = self.c1
-        groups = self.g
-        kernel_size = avgp.kernel_size
-        input_dim = channels // groups
-        k = torch.zeros((channels, input_dim, kernel_size, kernel_size))
-        k[np.arange(channels), np.tile(np.arange(input_dim), groups), :, :] = 1.0 / kernel_size ** 2
-        return k
-
     def _pad_1x1_to_3x3_tensor(self, kernel1x1):
         if kernel1x1 is None:
             return 0