fix gat and unigat bugs

Author: yifanfeng97

dhg/nn/convs/graphs/gat_conv.py

@@ -59,5 +59,4 @@ def forward(self, X: torch.Tensor, g: Graph) -> torch.Tensor:
             X = self.act(X)
             if self.bn is not None:
                 X = self.bn(X)
-            X = self.drop(X)
         return X

dhg/nn/convs/hypergraphs/unignn_conv.py

@@ -145,7 +145,6 @@ def forward(self, X: torch.Tensor, hg: Hypergraph) -> torch.Tensor:
             X = self.act(X)
             if self.bn is not None:
                 X = self.bn(X)
-            X = self.drop(X)
         return X