Tidy up #includes, deleting a bunch of unnecessary #includes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61715 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/FoldingSet.h

@@ -457,6 +457,4 @@ template<typename T> struct FoldingSetTrait<const T*> {
 
 } // End of namespace llvm.
 
-
 #endif
-

include/llvm/ADT/STLExtras.h

@@ -19,7 +19,7 @@
 
 #include <functional>
 #include <utility> // for std::pair
-#include <cstring> // for std::size_t
+#include <cstddef> // for std::size_t
 #include "llvm/ADT/iterator.h"
 
 namespace llvm {

include/llvm/ADT/SparseBitVector.h

@@ -17,11 +17,11 @@
 
 #include <cassert>
 #include <cstring>
-#include <algorithm>
 #include "llvm/Support/DataTypes.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/ADT/ilist.h"
+
 namespace llvm {
 
 /// SparseBitVector is an implementation of a bitvector that is sparse by only

include/llvm/ADT/ilist.h

@@ -40,7 +40,6 @@
 
 #include "llvm/ADT/iterator.h"
 #include <cassert>
-#include <cstdlib>
 
 namespace llvm {
 
@@ -366,7 +365,7 @@ public:
   }
 
   void swap(iplist &RHS) {
-    abort();     // Swap does not use list traits callback correctly yet!
+    assert(0 && "Swap does not use list traits callback correctly yet!");
     std::swap(Head, RHS.Head);
   }