Drop incorrect line from comment

This was a copy-paste error that I didn't catch earlier.

Signed-off-by: Pradyun Gedam <[email protected]>

src/pip/_internal/resolution/resolvelib/resolver.py

@@ -139,7 +139,6 @@ def resolve(self, root_reqs, check_supported_wheels):
  # * The --force-reinstall flag is set. Always reinstall.
  # * The installation is different in version or editable-ness, so
  # we need to uninstall it to install the new distribution.
- # * The installed version is different from the pending distribution.
  # * The candidate is a local wheel. Do nothing.
  # * The candidate is a local sdist. Print a deprecation warning.
  # * The candidate is a local path. Always reinstall.