Remove unused byte from Map::instance_sizes field.

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index 16816348c6ca01805f54c7d185fbcd3af722b5dd..cb55b99c84ac13e296458996dc08181e64b0e813 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -195,7 +195,6 @@ namespace internal {
   V(kParseScopeError, "Parse/scope error")                                     \
   V(kPossibleDirectCallToEval, "Possible direct call to eval")                 \
   V(kPreconditionsWereNotMet, "Preconditions were not met")                    \
-  V(kPropertyAllocationCountFailed, "Property allocation count failed")        \
   V(kReceivedInvalidReturnAddress, "Received invalid return address")          \
   V(kReferenceToAVariableWhichRequiresDynamicLookup,                           \
     "Reference to a variable which requires dynamic lookup")                   \