Remove unnecessary <sstream> includes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49681 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/TargetData.cpp

@@ -27,7 +27,6 @@
 #include "llvm/ADT/StringExtras.h"
 #include <algorithm>
 #include <cstdlib>
-#include <sstream>
 using namespace llvm;
 
 // Handle the Pass registration stuff necessary to use TargetData's.

lib/Transforms/Scalar/PredicateSimplifier.cpp

@@ -101,7 +101,6 @@
 #include "llvm/Transforms/Utils/Local.h"
 #include <algorithm>
 #include <deque>
-#include <sstream>
 #include <stack>
 using namespace llvm;