Revert of [turbofan] Insert dummy values when changing from None type.

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index 31122a5c82b43bbd35392ee162425bfa9228768a..0966334ffa4c6ee03b743515ab06a97f18823271 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -267,7 +267,9 @@
   V(kWrongArgumentCountForInvokeIntrinsic,                                     \
     "Wrong number of arguments for intrinsic")                                 \
   V(kShouldNotDirectlyEnterOsrFunction,                                        \
-    "Should not directly enter OSR-compiled function")
+    "Should not directly enter OSR-compiled function")                         \
+  V(kConversionFromImpossibleValue,                                            \
+    "Reached conversion from value with empty type (i.e., impossible type)")
 
 #define ERROR_MESSAGES_CONSTANTS(C, T) C,
 enum BailoutReason {