(bug 54287) Change logo for crwiki

Per local community consensus, the logo of the Cree Wikipedia (crwiki)
should be changed to one that uses English name and slogan. See
bug description for consensus confirmation from a local user.

Since the English logo is already defined as default for all our wikis,
I'm simply removing the logo definition from the file.

Bug: 54287
Change-Id: Ib977a9d5d80496f003fe3fe5e549d60e6067dbdc