python3Packages.update_checker: disable py2

```
builder for '/nix/store/2qwl0rkdm2gx2byhpmw7lxyg5rprwqqk-python2.7-update_checker-0.18.0.drv' failed with exit code 1; last 10 log lines:
  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 9
      with open(f"{MODULE_NAME}.py") as fp:
                                  ^
  SyntaxError: invalid syntax
```

0 files changed, 0 insertions, 0 deletions