Remove sub and sup opinionated resets

Author: jonathantneal

normalize.css

@@ -170,27 +170,6 @@ small {
   font-size: 80%;
 }
 
-/**
- * Prevent `sub` and `sup` elements from affecting the line height in
- * all browsers.
- */
-
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline;
-}
-
-sub {
-  bottom: -0.25em;
-}
-
-sup {
-  top: -0.5em;
-}
-
 /* Embedded content
    ========================================================================== */