Revert "Enable rc fastforward and rewind commands for RTSP trickplay."

This reverts commit 17014fad.

New features that are not self-contained and modify src/ are not
welcomed in -bugfix branches without pre-existent consensus.

modules/control/rc.c

@@ -1087,34 +1087,16 @@ static int Input( vlc_object_t *p_this, char const *psz_cmd,
         return VLC_SUCCESS;
     }
     else if ( !strcmp( psz_cmd, "fastforward" ) )
-    {
-        if( var_GetBool( p_input, "can-rewind" ) )
-        {
-            int i_rate = var_GetInteger( p_input, "rate" );
-            i_rate = (i_rate < 0) ? -i_rate : i_rate * 2;
-            var_SetInteger( p_input, "rate", i_rate );
-        }
-        else
     {
         val.i_int = config_GetInt( p_intf, "key-jump+extrashort" );
         var_Set( p_intf->p_libvlc, "key-pressed", val );
-        }
         vlc_object_release( p_input );
         return VLC_SUCCESS;
     }
     else if ( !strcmp( psz_cmd, "rewind" ) )
-    {
-        if( var_GetBool( p_input, "can-rewind" ) )
-        {
-            int i_rate = var_GetInteger( p_input, "rate" );
-            i_rate = (i_rate > 0) ? -i_rate : i_rate / 2;
-            var_SetInteger( p_input, "rate", i_rate );
-        }
-        else
     {
         val.i_int = config_GetInt( p_intf, "key-jump-extrashort" );
         var_Set( p_intf->p_libvlc, "key-pressed", val );
-        }
         vlc_object_release( p_input );
         return VLC_SUCCESS;
     }