docs: Drop comment on broken raspberrypi3-64 HDMI output

Graphical output on raspberrypi3-64 should now be fixed.

Signed-off-by: Paul Barker <pbarker@toganlabs.com>

docs/extra-apps.md

@@ -7,9 +7,3 @@ able to compile omxplayer you will need to whiteflag the commercial
 license in your local.conf:
 
     LICENSE_FLAGS_WHITELIST = "commercial"
-## raspberrypi3-64
-
-Currently, raspberrypi3-64 does not boot into graphics, this needs more investigation
-and fixes, until then none of images using graphics stack would boot into UI, although
-the system would be up and ready, graphics wont come up. One can use serial console or
-remote login to get into system