Glass edges (glass panes) are normally ground with diamond wheels at high speed water cooled. However you can easily de-burr an edge like that with a Dremel and small sanding drum just keep it moving as to build up little to no heat. Emery cloth will likewise knock that edge off wrap it around a flat tool like a file and knock the burrs off. probably no need to use too coarse a grit work down and polish if needed. worked in the glass industry 3 1/2 decades.
