ObjectiveC migrator: remove dead code.

llvm-svn: 189592
diff --git a/clang/lib/Basic/IdentifierTable.cpp b/clang/lib/Basic/IdentifierTable.cpp
index b1a22ee..5102f7c 100644
--- a/clang/lib/Basic/IdentifierTable.cpp
+++ b/clang/lib/Basic/IdentifierTable.cpp
@@ -461,20 +461,12 @@
   if (name.empty()) return OIT_None;
   switch (name.front()) {
     case 'a':
-      if (startsWithWord(name, "alloc")) return OIT_MemManage;
-      else
-        if (startsWithWord(name, "array")) return OIT_Array;
+      if (startsWithWord(name, "array")) return OIT_Array;
       break;
     case 'd':
       if (startsWithWord(name, "dictionary")) return OIT_Dictionary;
       if (startsWithWord(name, "default")) return OIT_Singleton;
       break;
-    case 'i':
-      if (startsWithWord(name, "init")) return OIT_MemManage;
-      break;
-    case 'r':
-      if (startsWithWord(name, "retain")) return OIT_MemManage;
-      break;
     case 's':
       if (startsWithWord(name, "shared") ||
           startsWithWord(name, "standard"))