Do not exclude stdlibs which are missing on purpose

* If files for these are added and loading does not work,
  they should fail this test.

Author: eregon

test/truffle/integration/no_extra_output/all_stdlibs.rb

@@ -35,19 +35,13 @@ def glob(pattern)
 stdlibs += %w[json]
 
 # 'continuation' warns on being required, as MRI
+# Others fail to load
 ignore = %w[
   continuation
-  dbm
-  gdbm
-  sdbm
   debug
   profile
   profiler
-  pty
-  ripper
   shell
-  win32
-  win32ole
 ]
 
 stdlibs -= ignore