Use this CSS code in the Custom CSS section inside Edwiser RemUI general settings-

div#CarouselCaptions {
display: none;

Note: This is applicable for Moodle and Edwiser RemUI version v3.4.x and below it.
For Moodle version and Edwiser RemUI version above v3.5.x and above it, you can use Homepage builder feature to design your desired Homepage.