remove grid fluid from dart api list (angular#2823)

Author: Eric Jimenez

public/docs/dart/latest/cheatsheet.jade

@@ -1,4 +1,4 @@
 - var base = current.path[4] ? '.' : './guide';
 
-.l-content-small.grid-fluid.docs-content.cheatsheet
+.l-content-small.docs-content.cheatsheet
   ngio-cheatsheet(src= base + '/cheatsheet.json')