fix: remove unused include / add const for necessity portion

Author: Tomonobu Saito

include/extractor/raster_source.hpp

@@ -15,9 +15,7 @@
 
 #include <storage/io.hpp>
 
-#include <iostream>
 #include <iterator>
-#include <list>
 #include <string>
 #include <unordered_map>
 using namespace std;

include/storage/io.hpp

@@ -68,7 +68,7 @@ class FileReader
                    ((fingerprint == FingerprintFlag::VerifyFingerprint) ? sizeof(util::FingerPrint)
                                                                         : 0);
         }
-        catch (boost::filesystem::filesystem_error &ex)
+        catch (const boost::filesystem::filesystem_error &ex)
         {
             std::cout << ex.what() << std::endl;
             throw;