Update upscale model code to latest Chainner model code.

Don't add SRFormer because the code license is incompatible with the GPL.

Remove MAT because it's unused and the license is incompatible with GPL.

comfy_extras/chainner_models/architecture/OmniSR/OmniSR.py

@@ -56,7 +56,17 @@ class OmniSR(nn.Module):
         residual_layer = []
         self.res_num = res_num
 
-        self.window_size = 8  # we can just assume this for now, but there's probably a way to calculate it (just need to get the sqrt of the right layer)
+        if (
+            "residual_layer.0.residual_layer.0.layer.2.fn.rel_pos_bias.weight"
+            in state_dict.keys()
+        ):
+            rel_pos_bias_weight = state_dict[
+                "residual_layer.0.residual_layer.0.layer.2.fn.rel_pos_bias.weight"
+            ].shape[0]
+            self.window_size = int((math.sqrt(rel_pos_bias_weight) + 1) / 2)
+        else:
+            self.window_size = 8
+
         self.up_scale = up_scale
 
         for _ in range(res_num):