Remove redundant `local_neg_neg`

aesara/tensor/math_opt.py

@@ -1740,16 +1740,6 @@ def local_opt_alloc(fgraph, node):
                 pass
 
 
-@register_specialize
-@local_optimizer([neg])
-def local_neg_neg(fgraph, node):
-    # other specializations shouldn't put this in,
-    # but sometimes they do
-    if node.op == neg:
-        if node.inputs[0].owner and node.inputs[0].owner.op == neg:
-            return [node.inputs[0].owner.inputs[0]]
-
-
 @register_specialize
 @local_optimizer([neg])
 def local_neg_div_neg(fgraph, node):