python3Packages.sphinxcontrib-openapi: disable py2

```
builder for '/nix/store/jz41wvwvkc6q55972ysdajm6k3vnv6r8-python2.7-sphinxcontrib-openapi-0.7.0.drv' failed with exit code 1; last 10 log lines:
  configuring
  no configure script, doing nothing
  building
  Executing setuptoolsBuildPhase
  Traceback (most recent call last):
    File "nix_run_setup", line 8, in <module>
      exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))
    File "setup.py", line 10, in <module>
      with open(os.path.join(here, "README.rst"), "r", encoding="utf-8") as f:
  TypeError: 'encoding' is an invalid keyword argument for this function
```

0 files changed, 0 insertions, 0 deletions