[regexp] Remove unused code

src/x87/interface-descriptors-x87.cc

Index: src/x87/interface-descriptors-x87.cc
diff --git a/src/x87/interface-descriptors-x87.cc b/src/x87/interface-descriptors-x87.cc
index 2e2890b9ab31d29f6b13f327bb1048289cdc6e6c..2bddece3544caa5f12047621647803a724b153de 100644
--- a/src/x87/interface-descriptors-x87.cc
+++ b/src/x87/interface-descriptors-x87.cc
@@ -202,13 +202,6 @@ void ConstructTrampolineDescriptor::InitializePlatformSpecific(
 }
 
 
-void RegExpConstructResultDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {ecx, ebx, eax};
-  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
-}
-
-
 void TransitionElementsKindDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {eax, ebx};