Disable font awesome, which was just breaking the font in the tips and other admonitions

Author: holly-cummins

src/css/vars.css

@@ -11,6 +11,7 @@
   --color-red: #ff004a;
   --color-dark-red: #c00;
   --color-cta-blue: #0b58ab;
+  --color-ultralight-grey: #fafafa;
   --color-grey-0: #efefef;
   --color-grey-1: #aaa;
   --color-grey-2: #555;
@@ -97,7 +98,7 @@
   --abstract-background: var(--color-black);
   --abstract-font-color: var(--color-black);
   --abstract-border-color: var(--panel-border-color);
-  --admonition-background: var(--panel-background);
+  --admonition-background: var(--color-ultralight-grey);
   --admonition-label-font-weight: var(--body-font-weight-bold);
   --caption-font-color: var(--color-grey-3);
   --caption-font-weight: var(--body-font-weight-bold);

src/partials/head-meta.hbs

@@ -1 +1 @@
-    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/all.css" integrity="sha384-lKuwvrZot6UHsBSfcMvOkWwlCMgc0TaWr+30HWe3a4ltaBwTZhyTEggF5tJv8tbt" crossorigin="anonymous">
+<!-- This wasn't displaying icons, and it was breaking the fonts on the admonitions   <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/all.css" integrity="sha384-lKuwvrZot6UHsBSfcMvOkWwlCMgc0TaWr+30HWe3a4ltaBwTZhyTEggF5tJv8tbt" crossorigin="anonymous">-->