lavu: drop time redefinition as it causes some problems in some uncommon configurations.

Based-on: e96d90eeSigned-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/internal.h

@@ -65,8 +65,6 @@
 #define free please_use_av_free
 #undef  realloc
 #define realloc please_use_av_realloc
-#undef  time
-#define time time_is_forbidden_due_to_security_issues
 #undef  rand
 #define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get
 #undef  srand