Remove doxygen test string accidently left in previous commit.
Remove doxygen test string accidently left in previous commit.

persmule/libsrtp,yarrcc/libsrtp-ios,persmule/libsrtp,ksophocleous/libsrtp,ksophocleous/libsrtp,cuijinquan/libsrtp,persmule/libsrtp,cuijinquan/libsrtp,cuijinquan/libsrtp,yarrcc/libsrtp-ios,yarrcc/libsrtp-ios,Distrotech/libsrtp,Distrotech/libsrtp