remove double argument --attn_resolutions

sgmse/backbones/ncsnpp_48k.py

@@ -43,7 +43,6 @@ class NCSNpp_48k(nn.Module):
         parser.add_argument("--num_res_blocks", type=int, default=2)
         parser.add_argument("--attn_resolutions", type=int, nargs='+', default=[])
         parser.add_argument("--nf", type=int, default=128, help="Number of channels to use in the model")
-        parser.add_argument("--attn_resolutions", type=int, nargs='+', default=[])
         parser.add_argument("--no-centered", dest="centered", action="store_false", help="The data is not centered [-1, 1]")
         parser.add_argument("--centered", dest="centered", action="store_true", help="The data is centered [-1, 1]")
         parser.add_argument("--progressive", type=str, default='none', help="Progressive downsampling method")
@@ -81,7 +80,7 @@ class NCSNpp_48k(nn.Module):
         self.nf = nf = nf
         ch_mult = ch_mult
         self.num_res_blocks = num_res_blocks = num_res_blocks
-        self.attn_resolutions = attn_resolutions = attn_resolutions
+        self.attn_resolutions = attn_resolutions
         dropout = dropout
         resamp_with_conv = resamp_with_conv
         self.num_resolutions = num_resolutions = len(ch_mult)