The MainWP Dashboard indicates with labels if a feature is New to that specific version or if it’s still in Beta.
To hide these labels, install Custom Dashboard extension and add the following CSS snippet:
.mainwp-new-feature-label, .mainwp-beta-feature-label {display: none !important;}
After entering the snippet and clicking the Save Changes button, the page will reload, and the labels will be hidden.
More info about Custom Dashboard extension can be found here.