Remove bulma box styling (#553)

Author: jarrodmillman

assets/theme-css/bulma.css

@@ -1,6 +1,5 @@
 /*! bulma.io v0.9.4 | MIT License | github.com/jgthms/bulma */
 .block:not(:last-child),
-.box:not(:last-child),
 .content:not(:last-child),
 .title:not(:last-child) {
   margin-bottom: 1.5rem;
@@ -29,27 +28,6 @@ span {
   font-style: inherit;
   font-weight: inherit;
 }
-.box {
-  background-color: #fff;
-  border-radius: 6px;
-  box-shadow:
-    0 0.5em 1em -0.125em rgba(10, 10, 10, 0.1),
-    0 0 0 1px rgba(10, 10, 10, 0.02);
-  color: #4a4a4a;
-  display: block;
-  padding: 1.25rem;
-}
-a.box:focus,
-a.box:hover {
-  box-shadow:
-    0 0.5em 1em -0.125em rgba(10, 10, 10, 0.1),
-    0 0 0 1px #485fc7;
-}
-a.box:active {
-  box-shadow:
-    inset 0 1px 2px rgba(10, 10, 10, 0.2),
-    0 0 0 1px #485fc7;
-}
 .container {
   flex-grow: 1;
   margin: 0 auto;