accountmodel: remove overkill assert
accountmodel: remove overkill assert

- We didn't find the account you were looking for,
deal with it, don't destroy a planet over it.

Change-Id: I89fb21b392fcf524c929e4b9ed795634282ed50c
Tuleap: #50

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc