The deactivate account dialog tried to shake the password box on
an incorrect password but it didn't work because we don't import
velocity-ui anywhere. Looks like we forgot to import it in
DeactivateAccountDialog.js and were relying on it being imported
elsewhere (so probably broke when BottomLeftMenu got removed).
Either way, we no longer use the field-shake animation anywhere else,
so just remove it.
David Baker
c9b972116a