[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

2 files changed, 0 insertions, 2 deletions

diff --git a/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp b/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp
index 34b2b13abe4..a386aeefde3 100644
--- a/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp
@@ -13,7 +13,6 @@
 #include "llvm/IR/CallSite.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/Transforms/Utils/Cloning.h"
-#include <set>
 #include <sstream>
 
 namespace llvm {
diff --git a/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp b/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp
index 06c2a8c42f6..2503654a403 100644
--- a/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/OrcArchitectureSupport.cpp
@@ -10,7 +10,6 @@
 #include "llvm/ADT/Triple.h"
 #include "llvm/ExecutionEngine/Orc/OrcArchitectureSupport.h"
 #include "llvm/Support/Process.h"
-#include <array>
 
 namespace llvm {
 namespace orc {