Eliminate duplicate or unneccesary #include's

llvm-svn: 2397
diff --git a/llvm/lib/CodeGen/RegAlloc/RegClass.cpp b/llvm/lib/CodeGen/RegAlloc/RegClass.cpp
index 607a4da..249b8db 100644
--- a/llvm/lib/CodeGen/RegAlloc/RegClass.cpp
+++ b/llvm/lib/CodeGen/RegAlloc/RegClass.cpp
@@ -1,5 +1,5 @@
 #include "llvm/CodeGen/RegClass.h"
-#include <iostream>
+#include "llvm/CodeGen/RegAllocCommon.h"
 using std::cerr;
 
 //----------------------------------------------------------------------------