remove skips of tests on linux

Passing just fine on Linux Mint, 3.4.0

glymur/test/test_icc.py

@@ -62,7 +62,6 @@ class TestICC(unittest.TestCase):
 
         self.assertEqual(profile['Creator'], 'JPEG')
 
-    @unittest.skipIf(sys.platform.startswith('linux'), 'Failing on linux')
     def test_invalid_profile_header(self):
         """invalid ICC header data should cause UserWarning"""
         jfile = opj_data_file('input/nonregression/orb-blue10-lin-jp2.jp2')

glymur/test/test_jp2box_xml.py

@@ -290,7 +290,6 @@ class TestBadButRecoverableXmlFile(unittest.TestCase):
 class TestXML_OpjDataRoot(unittest.TestCase):
     """Test suite for XML boxes, requires OPJ_DATA_ROOT."""
 
-    @unittest.skipIf(sys.platform.startswith('linux'), 'Failing on linux')
     def test_bom(self):
         """Byte order markers are illegal in UTF-8.  Issue 185"""
         filename = opj_data_file(os.path.join('input',

glymur/test/test_jp2k.py

@@ -1069,7 +1069,6 @@ class TestParsing(unittest.TestCase):
     def tearDown(self):
         pass
 
-    @unittest.skipIf(sys.platform.startswith('linux'), 'Failing on linux')
     def test_bad_rsiz(self):
         """Should not warn if RSIZ when parsing is turned off."""
         # Actually there are three warning triggered by this codestream.
@@ -1131,7 +1130,6 @@ class TestJp2kOpjDataRootWarnings(unittest.TestCase):
             self.assertTrue(issubclass(w[0].category, UserWarning))
             self.assertTrue('Invalid approximation' in str(w[0].message))
 
-    @unittest.skipIf(sys.platform.startswith('linux'), 'Failing on linux')
     def test_invalid_colorspace(self):
         """Should warn in case of invalid colorspace."""
         filename = opj_data_file('input/nonregression/edf_c2_1103421.jp2')