Revert of Add unoptimized/optimized variants of MathFloor TF code stub

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index 1e8cc2e5a7aae2a7f940f1a49e2d0cfc8b292ed0..fa41eb003620d30643581196f0c070eb5688a40e 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -359,30 +359,16 @@
 }
 
 
-Type::FunctionType* MathRoundVariantCallFromUnoptimizedCodeDescriptor::
-    BuildCallInterfaceDescriptorFunctionType(Isolate* isolate,
-                                             int paramater_count) {
-  Type::FunctionType* function = Type::FunctionType::New(
-      AnyTagged(), Type::Undefined(), 4, isolate->interface_descriptor_zone());
-  function->InitParameter(0, Type::Receiver());
-  function->InitParameter(1, SmiType());
-  function->InitParameter(2, AnyTagged());
-  function->InitParameter(3, AnyTagged());
-  return function;
-}
-
-
-Type::FunctionType* MathRoundVariantCallFromOptimizedCodeDescriptor::
-    BuildCallInterfaceDescriptorFunctionType(Isolate* isolate,
-                                             int paramater_count) {
-  Type::FunctionType* function = Type::FunctionType::New(
-      AnyTagged(), Type::Undefined(), 5, isolate->interface_descriptor_zone());
-  function->InitParameter(0, Type::Receiver());
-  function->InitParameter(1, SmiType());
-  function->InitParameter(2, AnyTagged());
-  function->InitParameter(3, AnyTagged());
-  function->InitParameter(4, AnyTagged());
-  return function;
-}
+Type::FunctionType*
+MathRoundVariantDescriptor::BuildCallInterfaceDescriptorFunctionType(
+    Isolate* isolate, int paramater_count) {
+  Type::FunctionType* function = Type::FunctionType::New(
+      AnyTagged(), Type::Undefined(), 2, isolate->interface_descriptor_zone());
+  function->InitParameter(0, SmiType());
+  function->InitParameter(1, AnyTagged());
+  return function;
+}
+
+
 }  // namespace internal
 }  // namespace v8