remove mini markdown renderer everywhere

was still used for comment emails etc

app/controllers/tools_controller.rb

@@ -8,12 +8,4 @@ class ToolsController < ApplicationController
     end
   end
 
-  def render_mini_markdown
-    if current_user
-      render text: render_mini_md(params[:text])
-    else
-      render text: "Error: You are not logged in!"
-    end
-  end
-
 end