Revoke "LocalContentCanAccess*Urls"

Since we embed the content of the PDF directly, we no longer need the
permissions for pdf.js.

qutebrowser/browser/webview.py

@@ -145,12 +145,6 @@ class WebView(QWebView):
         self.loadProgress.connect(lambda p: setattr(self, 'progress', p))
         objreg.get('config').changed.connect(self.on_config_changed)
 
-        # Allow pdf.js to retrieve pages
-        self.settings().setAttribute(
-            QWebSettings.LocalContentCanAccessRemoteUrls, True)
-        self.settings().setAttribute(
-            QWebSettings.LocalContentCanAccessFileUrls, True)
-
     def _init_page(self):
         """Initialize the QWebPage used by this view."""
         page = webpage.BrowserPage(self.win_id, self.tab_id, self)