Bug 806442: Remove unused variable "slot" from Compiler::markUndefinedLocal. r=billm

js/src/methodjit/Compiler.cpp

@@ -1290,7 +1290,6 @@ void
 mjit::Compiler::markUndefinedLocal(uint32_t offset, uint32_t i)
 {
     uint32_t depth = ssa.getFrame(a->inlineIndex).depth;
-    uint32_t slot = LocalSlot(script_, i);
     Address local(JSFrameReg, sizeof(StackFrame) + (depth + i) * sizeof(Value));
     masm.storeValue(UndefinedValue(), local);
 }