diff --git a/vyper/venom/passes/remove_unused_variables.py b/vyper/venom/passes/remove_unused_variables.py
index 1ea5410973..9ae368fb78 100644
--- a/vyper/venom/passes/remove_unused_variables.py
+++ b/vyper/venom/passes/remove_unused_variables.py
@@ -37,8 +37,6 @@ def _process_instruction(self, inst):
         if inst.is_volatile or inst.is_bb_terminator:
             return
 
-        bb = inst.parent
-
         uses = self.dfg.get_uses(inst.output)
         if len(uses) > 0:
             return