Merge pull request #5863 from benoit-pierre/drop_py25_workaround

drop workaround for Python<=2.5

src/pip/_internal/utils/misc.py

@@ -520,15 +520,11 @@ def untar_file(filename, location):
         mode = 'r:*'
     tar = tarfile.open(filename, mode)
     try:
-        # note: python<=2.5 doesn't seem to know about pax headers, filter them
         leading = has_leading_dir([
             member.name for member in tar.getmembers()
-            if member.name != 'pax_global_header'
         ])
         for member in tar.getmembers():
             fn = member.name
-            if fn == 'pax_global_header':
-                continue
             if leading:
                 fn = split_leading_dir(fn)[1]
             path = os.path.join(location, fn)

tests/data/packages/README.txt

@@ -59,10 +59,6 @@ parent/child-0.1.tar.gz
 The parent-0.1.tar.gz and child-0.1.tar.gz packages are used by
 test_uninstall:test_uninstall_overlapping_package.
 
-paxpkg.tar.bz2
---------------
-tar with pax headers
-
 pkgwithmpkg-1.0.tar.gz; pkgwithmpkg-1.0-py2.7-macosx10.7.mpkg.zip
 -----------------------------------------------------------------
 used for osx test case (tests.test_finder:test_no_mpkg)

tests/functional/test_install.py

@@ -522,13 +522,6 @@ def test_install_global_option(script):
     assert '0.1\n' in result.stdout
 
 
-def test_install_with_pax_header(script, data):
-    """
-    test installing from a tarball with pax header for python<2.6
-    """
-    script.pip('install', 'paxpkg.tar.bz2', cwd=data.packages)
-
-
 def test_install_with_hacked_egg_info(script, data):
     """
     test installing a package which defines its own egg_info class