[compiler] Drop the CompareNilIC.

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index fb1969d8ef7d27979557581339145dd28371c197..d62bee52039fd406d23df241a977f1b42f1190cf 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -58,7 +58,6 @@ class PlatformInterfaceDescriptor;
   V(InternalArrayConstructorConstantArgCount) \
   V(InternalArrayConstructor)                 \
   V(Compare)                                  \
-  V(CompareNil)                               \
   V(ToBoolean)                                \
   V(BinaryOp)                                 \
   V(BinaryOpWithAllocationSite)               \
@@ -631,12 +630,6 @@ class CompareDescriptor : public CallInterfaceDescriptor {
 };
 
 
-class CompareNilDescriptor : public CallInterfaceDescriptor {
- public:
-  DECLARE_DESCRIPTOR(CompareNilDescriptor, CallInterfaceDescriptor)
-};
-
-
 class ToBooleanDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(ToBooleanDescriptor, CallInterfaceDescriptor)