Remove check for GTK in tests, so that the default encoding remains ascii, and Unicode failures can be resolved.

IPython/testing/iptest.py

@@ -105,8 +105,6 @@ have['zope.interface'] = test_for('zope.interface')
 have['twisted'] = test_for('twisted')
 have['foolscap'] = test_for('foolscap')
 have['pexpect'] = test_for('pexpect')
-have['gtk'] = test_for('gtk')
-have['gobject'] = test_for('gobject')
 
 #-----------------------------------------------------------------------------
 # Functions and classes
@@ -171,9 +169,6 @@ def make_exclude():
     if not have['wx']:
         exclusions.append(ipjoin('lib', 'inputhookwx'))
 
-    if not have['gtk'] or not have['gobject']:
-        exclusions.append(ipjoin('lib', 'inputhookgtk'))
-
     # These have to be skipped on win32 because the use echo, rm, cd, etc.
     # See ticket https://bugs.launchpad.net/bugs/366982
     if sys.platform == 'win32':