Revert "src/themes/cgspace: limit community/collection logo size"

This reverts commit 6e9eea1b2db63210b3f075fe6f9c84e7e09f42b9.

DSpace Angular introduced logo constraints so we don't need this in
our theme anymore.

src/themes/cgspace/styles/_global-styles.scss

@@ -245,13 +245,3 @@ img.sdg {
 img.access-icon {
   width: 15px;
 }
-
-// The community/collection logo is huge on big screens, so limit it to 50% of
-// the ds-comcol-page-logo element on medium/tablet 768px and up.
-@media screen and (min-width: 768px) {
-  ds-comcol-page-logo {
-    img.img-fluid {
-      max-width: 50%;
-    }
-  }
-}