Remove some unneeded headers.

libsolidity/codegen/ABIFunctions.cpp

@@ -28,7 +28,6 @@
 #include <libsolutil/StringUtils.h>
 
 #include <boost/algorithm/string/join.hpp>
-#include <boost/range/adaptor/reversed.hpp>
 
 using namespace std;
 using namespace solidity;

libsolidity/codegen/ExpressionCompiler.cpp

@@ -36,7 +36,6 @@
 #include <libsolutil/Whiskers.h>
 
 #include <boost/algorithm/string/replace.hpp>
-#include <boost/range/adaptor/reversed.hpp>
 #include <numeric>
 #include <utility>
 

libsolidity/codegen/MultiUseYulFunctionCollector.cpp

@@ -23,8 +23,6 @@
 
 #include <liblangutil/Exceptions.h>
 
-#include <boost/algorithm/string/join.hpp>
-#include <boost/range/adaptor/reversed.hpp>
 
 using namespace std;
 using namespace solidity;

libsolidity/codegen/YulUtilFunctions.cpp

@@ -28,9 +28,6 @@
 #include <libsolutil/Whiskers.h>
 #include <libsolutil/StringUtils.h>
 
-#include <boost/algorithm/string/join.hpp>
-#include <boost/range/adaptor/reversed.hpp>
-
 using namespace std;
 using namespace solidity;
 using namespace solidity::util;

libsolidity/codegen/ir/IRGenerator.cpp

@@ -38,9 +38,6 @@
 
 #include <liblangutil/SourceReferenceFormatter.h>
 
-#include <boost/algorithm/string/predicate.hpp>
-#include <boost/range/adaptor/reversed.hpp>
-
 #include <sstream>
 
 using namespace std;

libsolidity/codegen/ir/IRGeneratorForStatements.cpp

@@ -42,7 +42,6 @@
 #include <libsolutil/Keccak256.h>
 #include <libsolutil/Visitor.h>
 
-#include <boost/range/adaptor/reversed.hpp>
 #include <boost/range/adaptor/transformed.hpp>
 
 using namespace std;