enhance(ecep): ecep_cms → ecep_assets (#321)

* enhance(ecep): from _cms to _assets

* chore(ecep): remove unnecessary CSS

No need to hide branding via CS. We now hide via setting —

`PORTAL_BRANDING = False`

— in Core-Portal-Deloyments.

Author: wesleyboar

ecep_cms/src/taccsite_custom/ecep_cms/static/ecep_cms/css/site.css ecep_assets/css/site.css

@@ -55,13 +55,3 @@ article.post-detail .byline {
 .s-header .navbar-brand {
   min-width: 76px;
 }
-
-
-
-
-
-/* UNORGANIZED */
-
-/* SEE: TACC/Core-Styles/blob/main/source/_imports/branding_logos.css */
-/* NOTE: This is ONLY allowed because branding was added to Footer via CMS */
-#header-branding { display: none; }