CLN: Remove unnecessary sys.version_info checks (#29210)

Author: gfyoung

pandas/tests/io/formats/test_to_csv.py

@@ -11,7 +11,7 @@
 
 class TestToCSV:
     @pytest.mark.xfail(
-        (3, 6, 5) > sys.version_info >= (3, 5),
+        (3, 6, 5) > sys.version_info,
         reason=("Python csv library bug (see https://bugs.python.org/issue32255)"),
     )
     def test_to_csv_with_single_column(self):

versioneer.py

@@ -8,7 +8,6 @@
 * https://github.com/warner/python-versioneer
 * Brian Warner
 * License: Public Domain
-* Compatible With: python2.6, 2.7, 3.2, 3.3, 3.4, and pypy
 * [![Latest Version]
 (https://pypip.in/version/versioneer/badge.svg?style=flat)
 ](https://pypi.org/project/versioneer/)
@@ -464,9 +463,9 @@ def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
         if verbose:
             print("unable to find command, tried %s" % (commands,))
         return None
-    stdout = p.communicate()[0].strip()
-    if sys.version_info[0] >= 3:
-        stdout = stdout.decode()
+
+    stdout = p.communicate()[0].strip().decode()
+
     if p.returncode != 0:
         if verbose:
             print("unable to run %s (error)" % dispcmd)
@@ -561,9 +560,9 @@ def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
         if verbose:
             print("unable to find command, tried %%s" %% (commands,))
         return None
-    stdout = p.communicate()[0].strip()
-    if sys.version_info[0] >= 3:
-        stdout = stdout.decode()
+
+    stdout = p.communicate()[0].strip().decode()
+
     if p.returncode != 0:
         if verbose:
             print("unable to run %%s (error)" %% dispcmd)