[regexp] Remove remainder of native RegExpExecStub

src/arm/interface-descriptors-arm.cc

Index: src/arm/interface-descriptors-arm.cc
diff --git a/src/arm/interface-descriptors-arm.cc b/src/arm/interface-descriptors-arm.cc
index 7e56698f00deed05d10cc5496e0fe73fa3865ec8..f4303b9bdd1733dada5139e262a59d0a508ca7e7 100644
--- a/src/arm/interface-descriptors-arm.cc
+++ b/src/arm/interface-descriptors-arm.cc
@@ -58,11 +58,6 @@ const Register MathPowIntegerDescriptor::exponent() {
   return MathPowTaggedDescriptor::exponent();
 }
 
-const Register RegExpExecDescriptor::StringRegister() { return r0; }
-const Register RegExpExecDescriptor::LastIndexRegister() { return r1; }
-const Register RegExpExecDescriptor::StringStartRegister() { return r2; }
-const Register RegExpExecDescriptor::StringEndRegister() { return r3; }
-const Register RegExpExecDescriptor::CodeRegister() { return r4; }
 
 const Register GrowArrayElementsDescriptor::ObjectRegister() { return r0; }
 const Register GrowArrayElementsDescriptor::KeyRegister() { return r3; }