fix: remove redundant CSS imports which broke sassc compiling

The ILA UI ELements sass needs dart sass, but it's already compiled into the leftarchive.ie CSS so doesn't need to be imported here

app/scss/ila.scss

@@ -3,9 +3,6 @@
 * These extend the default CSS file of the main site, which is also pulled.
 */
 
-@import "../../node_modules/ila-ui-elements/src/scss/loader";
-@import "../../node_modules/ila-ui-elements/src/scss/image-viewer";
-
 $background: #fafafa;
 $border: #ccc;
 $muted-text: #aaa;