[intrinsics] Remove unused %_RegExpExec and %_NumberToString.

src/interpreter/interpreter-intrinsics.h

Index: src/interpreter/interpreter-intrinsics.h
diff --git a/src/interpreter/interpreter-intrinsics.h b/src/interpreter/interpreter-intrinsics.h
index 22839e568e78289a0e4ad39d6736f99d322a5a02..563c312f485024c055d98034f14490393af0346e 100644
--- a/src/interpreter/interpreter-intrinsics.h
+++ b/src/interpreter/interpreter-intrinsics.h
@@ -33,8 +33,6 @@ namespace interpreter {
   V(IsJSReceiver, is_js_receiver, 1)                      \
   V(IsSmi, is_smi, 1)                                     \
   V(IsTypedArray, is_typed_array, 1)                      \
-  V(NumberToString, number_to_string, 1)                  \
-  V(RegExpExec, reg_exp_exec, 4)                          \
   V(SubString, sub_string, 3)                             \
   V(ToString, to_string, 1)                               \
   V(ToLength, to_length, 1)                               \