Removing print notebook from style.less.

IPython/frontend/html/notebook/static/less/style.less

@@ -2,6 +2,5 @@
 @import "variables.less";
 @import "flexible-box-model.less";
 @import "notebook.less";
-@import "printnotebook.less";
 @import "renderedhtml.less";
 @import "tooltip.less";