Fixed useless cleanup of cache in User.pm to improve performance.
Fixed useless cleanup of cache in User.pm to improve performance.

balazj/otrs,balazj/otrs,oiami/otrs,balazj/otrs,StCyr/otrs,balazj/otrs,StCyr/otrs,oiami/otrs,balazj/otrs,oiami/otrs,StCyr/otrs,StCyr/otrs,oiami/otrs,oiami/otrs,StCyr/otrs