#7 remove GVC RM-RK50

[sergio]

please remove GVC_RM-RK50 remote, I believe this is a misspelling and dup for JVC_RM-RK50

https://sourceforge.net/p/lirc-remotes/code/ci/master/tree/remotes/gvc/RM-RK50.lircd.conf
https://sourceforge.net/p/lirc-remotes/code/ci/master/tree/remotes/jvc/RM-RK50.lircd.conf