Remove "hacked" from "hacked by Lance Rushing"

Remove "hacked" from "hacked by Lance Rushing", because it is a false positive for some malware scanner who check for the string "hacked by".
See also: https://core.trac.wordpress.org/ticket/27946
Merge pull request #274 from Zodiac1978/patch-1

Remove "hacked" from "hacked by Lance Rushing"