Remove assertion from ~LockedPageManager

[crowning-]

This assertion will occur any time that the client quits without
shutting down properly due to an error condition. As the user will
report this error instead of the error that was the root cause, it is
better to remove it.

[crowning-]

Sorry @UdjinM6 , replacing my first commit was not possible, so I reverted to the commit before that.

Learned that this also automatically closes the pull-request (#396) assigned to it :-/

Git is complicated...

[UdjinM6]

Hmm.. reset --hard, commit and force push with-f should do the trick, I did that kind of stuff many times (though both --hard and -f is not a good practice at all but it's ok when you know what you're doing and no one else is working on that branch 😉 )... Strange it didn't work for you...

Btw there is a nice book about git http://git-scm.com/book/en/v2 (I read the v1 last year which was really helpful, I might need to have a look at v2 too though it's not yet translated properly)

Anyway, merging now 😄