Remove LESS vars from other branch.

services/web/public/stylesheets/core/_common-variables.less

@@ -937,14 +937,6 @@
 @chat-new-message-textarea-bg     : #FFF;
 @chat-new-message-textarea-color  : @gray-dark;
 
-// PDF
-@pdf-top-offset                  : @toolbar-tall-height;
-@pdf-bg                          : transparent;
-@pdfjs-bg                        : @gray-lighter;
-@pdf-page-shadow-color           : #000;
-@log-line-no-color               : @gray; 
-@log-hints-color                 : @gray-dark;
-
 // Tags
 @tag-border-radius  : 0.25em;
 @tag-bg-color       : @label-default-bg;