Remove redundant code for EOL Python <= 3.6

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### Description
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There's a few bits and pieces of code to support Python <= 3.6 which are no longer needed and can be removed, to slightly simplify the codebase.

### Checklist
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This pull request is:

- [ ] A documentation / typographical error fix
	- Good to go, no issue or tests are needed
- [x] A short code fix
	- please include the issue number, and create an issue if none exists, which
	  must include a complete example of the issue.  one line code fixes without an
	  issue and demonstration will not be accepted.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.   one line code fixes without tests will not be accepted.
- [ ] A new feature implementation
	- please include the issue number, and create an issue if none exists, which must
	  include a complete example of how the feature would look.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.

**Have a nice day!**

Closes: #7544
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/7544
Pull-request-sha: 282b4a91282902a57807aa2541b75b272b547127

Change-Id: I9ddf15fcf72551d52e3f027f337c7fee4aa9083b

1 files changed, 3 insertions, 15 deletions

diff --git a/lib/sqlalchemy/testing/plugin/pytestplugin.py b/lib/sqlalchemy/testing/plugin/pytestplugin.py
index 8679a9f12..7a62ad008 100644
--- a/lib/sqlalchemy/testing/plugin/pytestplugin.py
+++ b/lib/sqlalchemy/testing/plugin/pytestplugin.py
@@ -13,7 +13,6 @@ import itertools
 import operator
 import os
 import re
-import sys
 
 import pytest
 
@@ -528,13 +527,6 @@ def setup_test_methods(request):
     #    depending on the flags defined by the test class)
 
 
-def getargspec(fn):
-    if sys.version_info.major == 3:
-        return inspect.getfullargspec(fn)
-    else:
-        return inspect.getargspec(fn)
-
-
 def _pytest_fn_decorator(target):
     """Port of langhelpers.decorator with pytest-specific tricks."""
 
@@ -611,12 +603,8 @@ class PytestFixtureFunctions(plugin_base.FixtureFunctions):
         """
         from sqlalchemy.testing import exclusions
 
-        if sys.version_info.major == 3:
-            if len(arg_sets) == 1 and hasattr(arg_sets[0], "__next__"):
-                arg_sets = list(arg_sets[0])
-        else:
-            if len(arg_sets) == 1 and hasattr(arg_sets[0], "next"):
-                arg_sets = list(arg_sets[0])
+        if len(arg_sets) == 1 and hasattr(arg_sets[0], "__next__"):
+            arg_sets = list(arg_sets[0])
 
         argnames = kw.pop("argnames", None)
 
@@ -711,7 +699,7 @@ class PytestFixtureFunctions(plugin_base.FixtureFunctions):
                 return fn
             else:
                 if argnames is None:
-                    _argnames = getargspec(fn).args[1:]
+                    _argnames = inspect.getfullargspec(fn).args[1:]
                 else:
                     _argnames = re.split(r", *", argnames)