Remove the closure used with the `InternalRenderTask` class
Remove the closure used with the `InternalRenderTask` class

This patch utilizes the same approach as used in lots of other parts of the code-base, which thus *slightly* reduces the size of this code.

xavier114fch/pdf.js,Shoobx/pdf.js,mozilla/pdf.js,macroplant/pdf.js,mozilla/pdf.js,showpad/mozilla-pdf.js,nawawi/pdf.js,xavier114fch/pdf.js,timvandermeij/pdf.js,Snuffleupagus/pdf.js,timvandermeij/pdf.js,Shoobx/pdf.js,nawawi/pdf.js,macroplant/pdf.js,timvandermeij/pdf.js,Shoobx/pdf.js,nawawi/pdf.js,showpad/mozilla-pdf.js,macroplant/pdf.js,Snuffleupagus/pdf.js,showpad/mozilla-pdf.js,mozilla/pdf.js,Snuffleupagus/pdf.js