[regexp] Remove remainder of native RegExpExecStub

src/ia32/interface-descriptors-ia32.cc

Index: src/ia32/interface-descriptors-ia32.cc
diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index 304191bbd2747f9d208a252ec52d7763e6d1e1cb..c49a6fd4855db0b3ccfa63740d7c8bdab76129d4 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -56,11 +56,6 @@ const Register MathPowIntegerDescriptor::exponent() {
   return MathPowTaggedDescriptor::exponent();
 }
 
-const Register RegExpExecDescriptor::StringRegister() { return eax; }
-const Register RegExpExecDescriptor::LastIndexRegister() { return ecx; }
-const Register RegExpExecDescriptor::StringStartRegister() { return edx; }
-const Register RegExpExecDescriptor::StringEndRegister() { return ebx; }
-const Register RegExpExecDescriptor::CodeRegister() { return edi; }
 
 const Register GrowArrayElementsDescriptor::ObjectRegister() { return eax; }
 const Register GrowArrayElementsDescriptor::KeyRegister() { return ebx; }