Removed duplicate text.

CHANGELOG.md

@@ -3,8 +3,6 @@
 This release adds the following new features:
 
 * [Add Khmer language](https://github.com/wekan/wekan/commit/2156e458690d0dc34a761a48fd7fa3b54af79031);
-* [Modify card covers/mini-cards so that: 1) received date is shown unless there is a start date
-   2) due date is shown, unless there is an end date](https://github.com/wekan/wekan/pull/1685);
 * [Change label text colour to black for specific label colours for better
    visibility](https://github.com/wekan/wekan/pull/1689).