[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, 1 insertions, 2 deletions

diff --git a/llvm/lib/ExecutionEngine/TargetSelect.cpp b/llvm/lib/ExecutionEngine/TargetSelect.cpp
index 57f6e080414..b45f0c89de8 100644
--- a/llvm/lib/ExecutionEngine/TargetSelect.cpp
+++ b/llvm/lib/ExecutionEngine/TargetSelect.cpp
@@ -14,11 +14,10 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/ExecutionEngine/ExecutionEngine.h"
 #include "llvm/ADT/Triple.h"
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
 #include "llvm/IR/Module.h"
 #include "llvm/MC/SubtargetFeature.h"
-#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Host.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Target/TargetMachine.h"