[llvm] Remove useless headers in example BrainF (NFC)

Author: FantasqueX

llvm/examples/BrainF/BrainF.cpp

@@ -37,7 +37,6 @@
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Type.h"
-#include "llvm/Support/Casting.h"
 #include <cstdlib>
 #include <iostream>
 

llvm/examples/BrainF/BrainFDriver.cpp

@@ -28,7 +28,6 @@
 #include "llvm/Bitcode/BitcodeWriter.h"
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
 #include "llvm/ExecutionEngine/GenericValue.h"
-#include "llvm/ExecutionEngine/MCJIT.h"
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DerivedTypes.h"
@@ -38,13 +37,11 @@
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Value.h"
 #include "llvm/IR/Verifier.h"
-#include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Support/raw_ostream.h"
-#include <algorithm>
 #include <cstdlib>
 #include <fstream>
 #include <iostream>