fix bugs from CI

Author: zewenli98

py/torch_tensorrt/dynamo/conversion/_ConverterRegistry.py

@@ -481,7 +481,7 @@ def __getitem__(
                         return (
                             converters,
                             calling_convention,
-                            candidate.requires_output_allocator,
+                            False,
                         )
 
         raise KeyError(

py/torch_tensorrt/dynamo/lowering/passes/remove_num_users_is_0_nodes.py

@@ -16,7 +16,11 @@ def remove_num_users_is_0_nodes(
     output_node = list(gm.graph.nodes)[-1]
 
     for node in gm.graph.nodes:
-        if node != output_node and len(node.users) == 0:
+        if (
+            node != output_node
+            and len(node.users) == 0
+            and len(node.all_input_nodes) > 0
+        ):
             node_input = node.all_input_nodes[0]
             node.replace_all_uses_with(node_input)
             gm.graph.erase_node(node)