Remove obsolete file containing entries only for package versions that no longer exist.
add missed dep for doc build

(Portage version: 2.2.10/cvs/Linux x86_64, signed Manifest commit with key 0xB8072B0D)
Security bump (bug 524290). Remote syslog PRI vulnerability (CVE-2014-3683)

(Portage version: 2.2.14_rc1/cvs/Linux x86_64, signed Manifest commit with key 0x981CA6FC)
fix libsdl use deps (bug #524272)

(Portage version: 2.2.8-r2/cvs/Linux x86_64, unsigned Manifest commit)