remove invalid prompt

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1989 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/sounds/vm-mailbox-full.gsm b/sounds/vm-mailbox-full.gsm
deleted file mode 100755 (executable)
index f5de9ef..0000000
Binary files a/sounds/vm-mailbox-full.gsm and /dev/null differ