[runtime] [proxy] removing JSFunctionProxy and related code.

src/types.cc

Index: src/types.cc
diff --git a/src/types.cc b/src/types.cc
index 5cb4dfb6f4880a791566d352257e7d5b1582df56..8d3aaba1cd51aa907fe847f76afc0f84cf85bec4 100644
--- a/src/types.cc
+++ b/src/types.cc
@@ -253,7 +253,6 @@ TypeImpl<Config>::BitsetType::Lub(i::Map* map) {
     case JS_REGEXP_TYPE:
       return kOtherObject;  // TODO(rossberg): there should be a RegExp type.
     case JS_PROXY_TYPE:
-    case JS_FUNCTION_PROXY_TYPE:
       return kProxy;
     case MAP_TYPE:
       // When compiling stub templates, the meta map is used as a place holder