player: remove initial seek on playback start

Accidental leftover from commit ae55896f. (This seek ised to be done
with ordered chapters, and was accidentally changed to always being
done.)

player/loadfile.c

@@ -1189,8 +1189,6 @@ reopen_file:
         if (start != MP_NOPTS_VALUE)
             startpos = start;
     }
-    if (startpos == MP_NOPTS_VALUE)
-        startpos = 0;
     if (startpos != MP_NOPTS_VALUE) {
         queue_seek(mpctx, MPSEEK_ABSOLUTE, startpos, 0, true);
         execute_queued_seek(mpctx);