kobo cheats death again (+1 squashed commits)

Squashed commits:

[708e2429] kobo cheats death again

otherarch/sdcpp/util.cpp

@@ -62,19 +62,6 @@ void replace_all_chars(std::string& str, char target, char replacement) {
     }
 }
 
-std::string format(const char* fmt, ...) {
-    va_list ap;
-    va_list ap2;
-    va_start(ap, fmt);
-    va_copy(ap2, ap);
-    int size = vsnprintf(NULL, 0, fmt, ap);
-    std::vector<char> buf(size + 1);
-    int size2 = vsnprintf(buf.data(), size + 1, fmt, ap2);
-    va_end(ap2);
-    va_end(ap);
-    return std::string(buf.data(), size);
-}
-
 #ifdef _WIN32  // code for windows
 #include <windows.h>