[api-minor] Remove the type from RenderingCancelledException (PR 16226 follow-up)

After PR 16226 we're only using `RenderingCancelledException` together with canvas-rendering, hence the `type`-property is no longer necessary.

src/display/api.js

@@ -3347,7 +3347,6 @@ class InternalRenderTask {
       error ||
         new RenderingCancelledException(
           `Rendering cancelled, page ${this._pageIndex + 1}`,
-          "canvas",
           extraDelay
         )
     );