[NFC] Header cleanup

Removed some unused headers, replaced some headers with forward class declarations.

Found using simple scripts like this one:
clear && ack --cpp -l '#include "llvm/ADT/IndexedMap.h"' | xargs grep -L 'IndexedMap[<]' | xargs grep -n --color=auto 'IndexedMap'

Patch by Eugene Kosov <claprix@yandex.ru>

Differential Revision: http://reviews.llvm.org/D19219

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266595

1 files changed, 0 insertions, 2 deletions

diff --git a/llvm/unittests/ADT/TinyPtrVectorTest.cpp b/llvm/unittests/ADT/TinyPtrVectorTest.cpp
index 294dfac..26189b7 100644
--- a/llvm/unittests/ADT/TinyPtrVectorTest.cpp
+++ b/llvm/unittests/ADT/TinyPtrVectorTest.cpp
@@ -14,11 +14,9 @@
 #include "llvm/ADT/TinyPtrVector.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/type_traits.h"
 #include "gtest/gtest.h"
 #include <algorithm>
-#include <list>
 #include <vector>
 
 using namespace llvm;