Update onnxscript/ir/passes/common/unused_removal.py

Co-authored-by: Justin Chu <justinchuby@users.noreply.github.com>

Author: leshabirukov

onnxscript/ir/passes/common/unused_removal.py

@@ -98,9 +98,9 @@ def call(self, model: ir.Model) -> ir.passes.PassResult:
         graph_outputs = frozenset(model.graph.outputs)
         initializers = model.graph.initializers
         graph_inputs = model.graph.inputs
-        for num, input in reversed(list(enumerate(graph_inputs))):
+        for i, input in reversed(list(enumerate(graph_inputs))):
             if input.name in initializers and not (input in graph_outputs or input.uses()):
-                del graph_inputs[num]
+                del graph_inputs[i]
                 count += 1
         for init in list(initializers.values()):
             if not (init in graph_outputs or init.uses()):