V4L2: do not probe and keep video standard

Keeping the list of video standards in memory was almost pure waste:
The whole data set was only used to print one debug message.

The list of supported standards depends on the selected input.
So listing the standards during probe was wrong in any case.

modules/access/v4l2.c

@@ -545,8 +545,6 @@ struct demux_sys_t
     struct v4l2_input *p_inputs;
     unsigned i_selected_input;
 
-    unsigned i_standard;
-    struct v4l2_standard *p_standards;
     v4l2_std_id i_selected_standard_id;
 
     uint32_t i_audio;
@@ -1055,7 +1053,6 @@ static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
     /* Close */
     if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
     free( p_sys->psz_device );
-    free( p_sys->p_standards );
     free( p_sys->p_inputs );
     free( p_sys->p_tuners );
     free( p_sys->p_codecs );
@@ -1781,7 +1778,6 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
 #endif
 
     /* Select standard */
-
     if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
     {
         v4l2_std_id std = p_sys->i_selected_standard_id;
@@ -1793,9 +1789,6 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
         }
         msg_Dbg( p_obj, "standard set to 0x%"PRIx64":", std );
         p_sys->i_selected_standard_id = std;
-        for( unsigned i = 0; i < p_sys->i_standard; i++)
-            if( p_sys->p_standards[i].id & std )
-                msg_Dbg( p_obj, "  %s", p_sys->p_standards[i].name );
     }
 
     /* Tune the tuner */
@@ -2430,40 +2423,6 @@ static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
         }
     }
 
-    /* Probe video standards */
-    if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
-    {
-        struct v4l2_standard t_standards;
-        t_standards.index = 0;
-        p_sys->i_standard = 0;
-        while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
-        {
-            if( t_standards.index != p_sys->i_standard )
-                break;
-            p_sys->i_standard++;
-            t_standards.index = p_sys->i_standard;
-        }
-
-        free( p_sys->p_standards );
-        p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
-        if( !p_sys->p_standards ) goto error;
-
-        for( unsigned i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
-        {
-            p_sys->p_standards[i_standard].index = i_standard;
-
-            if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
-            {
-                msg_Err( p_obj, "cannot get video input standards: %m" );
-                goto error;
-            }
-            msg_Dbg( p_obj, "video standard %u is: %s %c",
-                                i_standard,
-                                p_sys->p_standards[i_standard].name,
-                                (p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id) ? '*' : ' ' );
-        }
-    }
-
     /* initialize the structures for the ioctls */
     for( unsigned i_index = 0; i_index < 32; i_index++ )
     {