Remove old code roll random artists

Removed context menu entry that used to be for rolling artists from the now removed artists.csv.

It was probably meant to be removed at commit 6d805b6.

javascript/contextMenus.js

@@ -161,14 +161,6 @@ addContextMenuEventListener = initResponse[2];
   appendContextMenuOption('#img2img_interrupt','Cancel generate forever',cancelGenerateForever)
   appendContextMenuOption('#img2img_generate', 'Cancel generate forever',cancelGenerateForever)
 
-  appendContextMenuOption('#roll','Roll three',
-    function(){
-      let rollbutton = get_uiCurrentTabContent().querySelector('#roll');
-      setTimeout(function(){rollbutton.click()},100)
-      setTimeout(function(){rollbutton.click()},200)
-      setTimeout(function(){rollbutton.click()},300)
-    }
-  )
 })();
 //End example Context Menu Items