[Interpreter] Use FastNewSloppyArguments when possible.

src/interpreter/interpreter-assembler.h

Index: src/interpreter/interpreter-assembler.h
diff --git a/src/interpreter/interpreter-assembler.h b/src/interpreter/interpreter-assembler.h
index 03a6a97c4ed74bd895fab53eaed174d451e878e4..07335dfda567e1daff44fed98077576c17fda138 100644
--- a/src/interpreter/interpreter-assembler.h
+++ b/src/interpreter/interpreter-assembler.h
@@ -67,9 +67,6 @@ class InterpreterAssembler : public CodeStubAssembler {
   // Load constant at |index| in the constant pool.
   compiler::Node* LoadConstantPoolEntry(compiler::Node* index);
 
-  // Load a field from an object on the heap.
-  compiler::Node* LoadObjectField(compiler::Node* object, int offset);
-
   // Load |slot_index| from |context|.
   compiler::Node* LoadContextSlot(compiler::Node* context, int slot_index);
   compiler::Node* LoadContextSlot(compiler::Node* context,