GH-93: Remove erroneous border

Wes added this because some designs have it (like UTRC homepage, but that's not the design referenced when this was added), but the official TACC Common Components design and the Frontera redesign's do not show it. If there really should be a border-bottom, we can bring it back.

Author: wesleyboar

taccsite_cms/static/site_cms/css/src/_imports/trumps/s-header.css

@@ -32,9 +32,6 @@ Styleguide Trumps.Scopes.Header
   /* Copied from Portal (via `body`) */
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
-
-  /* To hide border, set this in theme to match `--header-bkgd-color` value */
-  border-bottom: 1px solid env(--header-major-border-color);
 }
 
 

taccsite_cms/static/site_cms/css/src/_themes/theme.default.json

@@ -10,6 +10,7 @@
     "--header-bkgd-color": "var(--global-color-primary--xx-dark)",
     "--header-minor-border-color": "var(--global-color-primary--normal)",
     "// To 'hide' border by setting its color to match background color": "",
+    "// GH-101: Header redesign will use this variable": "",
     "--header-major-border-color": "var(--global-color-primary--xx-dark)"
 
   }