Revert "Test suite: disable tests that are known broken due to a Tor Browser bug"

This reverts commit 15ff2632.

https://labs.riseup.net/code/issues/15024#note-6 was missed
when we closed #15024.

features/torified_browsing.feature

@@ -26,8 +26,7 @@ Feature: Browsing the web using the Tor Browser
     When I start the Tor Browser
     And the Tor Browser loads the startup page
     Then I can save the current page as "index.html" to the default downloads directory
-    # XXX: re-enable once #15024 is fixed
-    # And I can print the current page as "output.pdf" to the default downloads directory
+    And I can print the current page as "output.pdf" to the default downloads directory
 
   #11592
   @check_tor_leaks @fragile
@@ -140,8 +139,7 @@ Feature: Browsing the web using the Tor Browser
     And I can save the current page as "index.html" to the persistent Tor Browser directory
     When I open the address "file:///home/amnesia/Persistent/Tor Browser/index.html" in the Tor Browser
     Then I see "TorBrowserSavedStartupPage.png" after at most 10 seconds
-    # XXX: re-enable once #15024 is fixed
-    # And I can print the current page as "output.pdf" to the persistent Tor Browser directory
+    And I can print the current page as "output.pdf" to the persistent Tor Browser directory
 
   #11585
   @fragile