ISTWCMS-5204: updating responsive image style yml so that site will install

config/install/responsive_image.styles.uw_ris_media.yml

@@ -9,8 +9,6 @@ dependencies:
     - image.style.uw_is_media_x_large
     - image.style.uw_is_media_x_small
     - image.style.uw_is_portrait
-  theme:
-    - uw_fdsu_theme_resp
 id: uw_ris_media
 label: 'UW media'
 image_style_mappings: