Revert "Add more emoticons"

This adds a new feature to a frozen release branch.
Even more, the new feature adds a new UI visible string without
translating it, to circumvent the string freeze.

Similar commits like these (just with the proper i18n() string) were
done in the past days, breaking the feature and string freezes.

CCMAIL: montel@kde.org
CCMAIL: release-team@kde.org

This reverts commit 5f35f89b.