WPDB: In [30345,30346,30366,30375], we added sanity checks for saving posts containing emoji. We need to revert these checks for now, as they're not ready for release in 4.1.

See #21212.


git-svn-id: https://develop.svn.wordpress.org/branches/4.1@30807 602fd350-edb4-49c9-b593-d223f7449a82