remove the render timeout

pdfjs uses requestAnimationFrame to schedule the rendering, and this
does not fire if the tab is inactive. That causes an unwanted error if
switching tabs for more than the one minute timeout.

services/web/public/coffee/ide/pdfng/directives/pdfRenderer.coffee

@@ -8,7 +8,6 @@ define [
 		class PDFRenderer
 			JOB_QUEUE_INTERVAL: 25
 			PAGE_LOAD_TIMEOUT: 60*1000
-			PAGE_RENDER_TIMEOUT: 60*1000
 			INDICATOR_DELAY1: 100  # time to delay before showing the indicator
 			INDICATOR_DELAY2: 250  # time until the indicator starts animating
 
@@ -295,19 +294,9 @@ define [
 					transform: [pixelRatio, 0, 0, pixelRatio, 0, 0]
 				}
 
-				timedOut = false
-
-				timer = $timeout () =>
-					# page render timed out
-					Raven?.captureMessage?('pdfng page render timed out after ' + @PAGE_RENDER_TIMEOUT + 'ms (1% sample)') if Math.random() < 0.01
-					timedOut = true
-					result.cancel()
-				, @PAGE_RENDER_TIMEOUT
-
 				result.then () ->
 					# page render success
 					element.canvas.replaceWith(canvas)
-					$timeout.cancel(timer)
 					canvas.removeClass('pdfng-rendering')
 					page.getTextContent().then (textContent) ->
 						textLayer.setTextContent textContent
@@ -319,10 +308,7 @@ define [
 						self.errorCallback?(error)
 				.catch (error) ->
 					# page render failed
-					$timeout.cancel(timer)
-					if timedOut
-						self.errorCallback?('timeout')
-					else if error is 'cancelled'
+					if error is 'cancelled'
 						return # do nothing when cancelled
 					else
 						self.errorCallback?(error)