You can hide that link completely by adding the following CSS code in the Custom CSS option of your theme on the below path.
Admin Area -> Appearance -> Customize -> Activello Options -> Other -> Custom CSS
.post-navigation a[href*="/slider-images/"]{
display: none;
}
You can exclude slider posts appearing anywhere on the site by developing custom code as developed here https://colorlibsupport.com/t/suppress-slider-on-posts-page/#post-24989 https://colorlibsupport.com/t/exclude-slider-category-on-home-page-and-post-page/
Also you can use pages for the slider instead of posts by developing solution as described here https://colorlibsupport.com/t/slider-for-pages/#post-33351