Don't write meaningless WSREP messages to stdout / error log

The script writes it every time when it gets started, even though it has no wsrep/galera configuration whatsoever. Please don't do it.

150331 15:45:27 mysqld_safe WSREP: Running position recovery with --log_error='/data/releases/mariadb-10.1.3-linux-x86_64/data/wsrep_recovery.dlREN7' --pid-file='/data/releases/mariadb-10.1.3-linux-x86_64/data/wheezy-64-recover.pid'

150331 15:45:30 mysqld_safe WSREP: Position recovery skipped

It's useless noise for a standalone server.
Please don't write "Running position recovery" if it is "skipped" anyway; and try not to write "skipped" either, unless it's skipped on a questionable reason.