[regexp] Remove unused code

src/s390/interface-descriptors-s390.cc

Index: src/s390/interface-descriptors-s390.cc
diff --git a/src/s390/interface-descriptors-s390.cc b/src/s390/interface-descriptors-s390.cc
index 265ef4c25947c71e0e2bf284d95bff959d71645c..04f2f1ed665e4b63dd1e956d546902cf2fd8850c 100644
--- a/src/s390/interface-descriptors-s390.cc
+++ b/src/s390/interface-descriptors-s390.cc
@@ -184,12 +184,6 @@ void ConstructTrampolineDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
-void RegExpConstructResultDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {r4, r3, r2};
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
 void TransitionElementsKindDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r2, r3};