kill dead attributes

I was in here and noticed a few of them aren't used.

hphp/runtime/base/class_info.cpp

@@ -644,26 +644,6 @@ ClassInfoUnique::ClassInfoUnique(const char **&p) {
   }
   p++;
 
-  if (m_attribute & ClassInfo::UsesTraits) {
-    while (*p) {
-      String trait_name = makeStaticString(*p++);
-      assert(m_traits.find(trait_name) == m_traits.end());
-      m_traits.insert(trait_name);
-      m_traitsVec.push_back(trait_name);
-    }
-    p++;
-  }
-
-  if (m_attribute & ClassInfo::HasAliasedMethods) {
-    while (*p) {
-      String new_name = makeStaticString(*p++);
-      String old_name = makeStaticString(*p++);
-      m_traitAliasesVec.push_back(std::pair<String, String>(
-        new_name, old_name));
-    }
-    p++;
-  }
-
   while (*p) {
     MethodInfo *method = new MethodInfo(p);
 

hphp/runtime/base/class_info.h

@@ -35,7 +35,6 @@ class ClassInfoHook;
 class ClassInfo {
 public:
   enum Attribute {                      //  class   prop   func  method param
-    IsOverride             = (1 <<  0), //           x
     IsRedeclared           = (1 <<  1), //    x             x
     IsVolatile             = (1 <<  2), //    x             x
 
@@ -60,7 +59,6 @@ public:
     IsNothing              = (1 << 13),
 
     HasDocComment          = (1 << 14), //                  x      x
-    IsLazyInit             = (1 << 15), //    x
     HasGeneratorAsBody     = (1 << 15), //                  x      x
     HipHopSpecific         = (1 << 16), //    x             x
 
@@ -79,8 +77,6 @@ public:
     IsSystem               = (1 << 28), //    x             x
 
     IsTrait                = (1 << 29), //    x
-    UsesTraits             = (1 << 30), //    x
-    HasAliasedMethods      = (1u << 31),//    x
     NeedsActRec            = (1u << 31),//                  x      x
   };