unused defines cleaning / a few fixes for clock

src/window.h

@@ -30,19 +30,13 @@
 #include <stack>
 #include <vector>
 #include <string>
-#include <cstdlib>
-#include <cstring>
 
 #ifdef _UTF8
 # define my_char_t wchar_t
-# define my_string_t wstring
-# define UTF_S_FMT "%ls"
 # define TO_STRING(x) ToString(x)
 # define TO_WSTRING(x) ToWString(x)
 #else
 # define my_char_t char
-# define my_string_t string
-# define UTF_S_FMT "%s"
 # define TO_STRING(x) x
 # define TO_WSTRING(x) x
 #endif