[stubs] Port LoadFunctionPrototypeStub to CSA

src/ic/mips/handler-compiler-mips.cc

Index: src/ic/mips/handler-compiler-mips.cc
diff --git a/src/ic/mips/handler-compiler-mips.cc b/src/ic/mips/handler-compiler-mips.cc
index 53720319ab75b3a20afabe0fd8b465b94d606f1b..c14652cf4726c6325d94f647f6b89febd4becd8e 100644
--- a/src/ic/mips/handler-compiler-mips.cc
+++ b/src/ic/mips/handler-compiler-mips.cc
@@ -173,15 +173,6 @@ void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup(
   __ DecrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1);
 }
 
-void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(
-    MacroAssembler* masm, Register receiver, Register scratch1,
-    Register scratch2, Label* miss_label) {
-  __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, scratch1);
-}
-
-
 // Generate code to check that a global property cell is empty. Create
 // the property cell at compilation time if no cell exists for the
 // property.