[cleanup] Drop handwritten KeyedStoreIC code

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index eed309654e1cc2d1f92c40c8c8ee76294a87a654..4992796376f57857a69c86a8fc41d7a48bd32cf7 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -139,7 +139,6 @@ namespace internal {
   V(kNotEnoughSpillSlotsForOsr, "Not enough spill slots for OSR")              \
   V(kNotEnoughVirtualRegistersRegalloc,                                        \
     "Not enough virtual registers (regalloc)")                                 \
-  V(kObjectFoundInSmiOnlyArray, "Object found in smi-only array")              \
   V(kObjectLiteralWithComplexProperty, "Object literal with complex property") \
   V(kOffsetOutOfRange, "Offset out of range")                                  \
   V(kOperandIsANumber, "Operand is a number")                                  \