Revert "Fix Compile Warnings (#5963)"

This reverts commit b83e16dbdd.

Found regressions like auto orientation didn't work anymore after this change, revert it

src/libslic3r/utils.cpp

@@ -3,12 +3,19 @@
 
 #include <atomic>
 #include <locale>
+#include <ctime>
 #include <cstdarg>
 #include <stdio.h>
 
 #include "format.hpp"
+#include "Platform.hpp"
+#include "Time.hpp"
 #include "libslic3r.h"
 
+#ifdef __APPLE__
+#include "MacUtils.hpp"
+#endif
+
 #ifdef WIN32
 	#include <windows.h>
 	#include <psapi.h>
@@ -25,7 +32,6 @@
 	#ifdef __APPLE__
 		#include <mach/mach.h>
 		#include <libproc.h>
-        #include "MacUtils.hpp"
 	#endif
 	#ifdef __linux__
 		#include <sys/stat.h>
@@ -33,7 +39,6 @@
 		#include <sys/sendfile.h>
 		#include <dirent.h>
 		#include <stdio.h>
-        #include "Platform.hpp"
 	#endif
 #endif
 
@@ -1484,6 +1489,8 @@ bool bbl_calc_md5(std::string &filename, std::string &md5_out)
     MD5_Init(&ctx);
     boost::nowide::ifstream ifs(filename, std::ios::binary);
     std::string                 buf(64 * 1024, 0);
+    const std::size_t &         size      = boost::filesystem::file_size(filename);
+    std::size_t                 left_size = size;
     while (ifs) {
         ifs.read(buf.data(), buf.size());
         int read_bytes = ifs.gcount();