usePageViewController pdf removed

Signed-off-by: Marino Faggiana <marino@marinofaggiana.com>

iOSClient/Viewer/NCViewerPDF/NCViewerPDF.swift

@@ -89,9 +89,9 @@ class NCViewerPDF: UIViewController, NCViewerPDFSearchDelegate {
         pdfView.autoScales = true
         pdfView.displayMode = .singlePageContinuous
         pdfView.displayDirection = .vertical
-        //pdfView.maxScaleFactor = 4.0
-        //pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit
-        pdfView.usePageViewController(true)
+        // pdfView.maxScaleFactor = 4.0
+        // pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit
+        // pdfView.usePageViewController(true)
         view.addSubview(pdfView)
 
         // PDF THUMBNAIL