Remove icon-border

Uses 3rd-party resources and is not very generalized as a use-case. Better avoid adding it, at least for now.

snippets/button-border.md

@@ -1,4 +1,4 @@
-### Toggle switch
+### Button border animation
 
 Creates a border animation on hover.
 

snippets/icon-border.md

@@ -1,77 +0,0 @@
-### Icon Border Animation
-
-Creates a border animation on hover.
-
-#### HTML
-
-```html
-<a href="#" class="button ion-ios-star-outline"></a>
-```
-
-#### CSS
-
-```css
-@import url(https://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css);
-.button {
-  position: relative;
-  overflow: hidden;
-  font-size: 40px;
-  color: rgba(255, 255, 255, 0.8);
-  margin: 40px;
-  padding: 3px;
-  display: inline-block;
-  text-align: center;
-  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.6);
-  text-decoration: none;
-  -webkit-box-sizing: border-box;
-  box-sizing: border-box;
-}
-.button::before {
-  background-color: #2b2b2b;
-  width: 75px;
-  height: 75px;
-  line-height: 75px;
-}
-.button:after {
-  position: absolute;
-  top: 0;
-  bottom: 0;
-  left: 0;
-  right: 0;
-  background-color: #f39c12;
-  content: '';
-  z-index: -1;
-  display: inline-block;
-  -webkit-transform: rotate(-45deg) scale(1.5) translate(0%, -100%);
-  transform: rotate(-45deg) scale(1.5) translate(0%, -100%);
-}
-.button:before,
-.button:after {
-  -webkit-transition: all 0.4s ease-in-out;
-  transition: all 0.4s ease-in-out;
-}
-.button:hover,
-.button:active,
-.button.hover {
-  color: #ffffff;
-}
-.button:hover:after,
-.button:active:after,
-.button.hover:after {
-  -webkit-transform: rotate(-45deg) scale(1.5) translate(0%, 0%);
-  transform: rotate(-45deg) scale(1.5) translate(0%, 0%);
-}
-```
-
-#### Demo
-
-#### Explanation
-
-This effect is uses before and after selectors to make the border full width on hover.
-
-#### Browser support
-
-<span class="snippet__support-note">✅ No caveats.</span>
-
-<!-- tags: visual, interactivity -->
-<!-- date: 2018-10-30 -->