[Analysis] Remove unused includes (NFC)

These are identified by misc-include-cleaner.  I've filtered out those
that break builds.  Also, I'm staying away from llvm-config.h,
config.h, and Compiler.h, which likely cause platform- or
compiler-specific build failures.

Author: kazutakahirata

llvm/lib/Analysis/CallGraphSCCPass.cpp

@@ -26,7 +26,6 @@
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/LegacyPassManagers.h"
 #include "llvm/IR/Module.h"
-#include "llvm/IR/OptBisect.h"
 #include "llvm/IR/PassTimingInfo.h"
 #include "llvm/IR/PrintPasses.h"
 #include "llvm/Pass.h"

llvm/lib/Analysis/IR2Vec.cpp

@@ -13,7 +13,6 @@
 
 #include "llvm/Analysis/IR2Vec.h"
 
-#include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/PassManager.h"

llvm/lib/Analysis/LoopAccessAnalysis.cpp

@@ -47,7 +47,6 @@
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Operator.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Value.h"

llvm/lib/Analysis/ScalarEvolution.cpp

@@ -62,7 +62,6 @@
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DepthFirstIterator.h"
-#include "llvm/ADT/EquivalenceClasses.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/ScopeExit.h"

llvm/lib/Analysis/StaticDataProfileInfo.cpp

@@ -4,7 +4,6 @@
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/ProfileData/InstrProf.h"
-#include <sys/types.h>
 
 using namespace llvm;
 void StaticDataProfileInfo::addConstantProfileCount(