[kde-doc-english]Kate.po (nearly) duplicate string

[Vedran Ljubovic]

#: app/katemainwindow.cpp:263
msgid ""
"This lists files which you have opened recently, and allows you to easily "
"open them again."

#: app/kwritemain.cpp:184
msgid ""
"This lists files you have opened recently, and allows you to easily open "
"them again."

These two strings differ only in "which" which is AFAIK unnecessary here.