diff --git a/js/src/jit/IonAnalysis.cpp b/js/src/jit/IonAnalysis.cpp
index 1158f6e8ca23..da83bd5caaee 100644
--- a/js/src/jit/IonAnalysis.cpp
+++ b/js/src/jit/IonAnalysis.cpp
@@ -3374,8 +3374,6 @@ bool jit::EliminateRedundantChecks(MIRGraph& graph) {
     }
   }
 
-  MDefinitionVector eliminateList(graph.alloc());
-
   // Starting from each self-dominating block, traverse the CFG in pre-order.
   while (!worklist.empty()) {
     MBasicBlock* block = worklist.popCopy();
@@ -3408,11 +3406,6 @@ bool jit::EliminateRedundantChecks(MIRGraph& graph) {
 
   MOZ_ASSERT(index == graph.numBlocks());
 
-  for (size_t i = 0; i < eliminateList.length(); i++) {
-    MDefinition* def = eliminateList[i];
-    def->block()->discardDef(def);
-  }
-
   return true;
 }