🐛 fix line number height #12

Simply don't set a specific font size anyomre. Probably a change in
highlkightjs that we were not aware of.

source/css/highlight.styl

@@ -28,7 +28,6 @@ $code-block
 
 $line-numbers
   color: #666
-  font-size: 0.85em
 
 code
 	background-color: code-background
@@ -38,10 +37,6 @@ code
 .highlight .line.marked
   background-color: darken(code-background, 10%)
 
-//HACK this is so super hacky but it gets the numbers to align.
-.highlight .line
-	min-height: 22px
-
 article
   pre, code
 	  font-family: fontsMono