pyproject: Remove dev-mode-dirs

This was only needed because tests needed changing to tests/ dir:
this is no longer the case.

Signed-off-by: Jussi Kukkonen <jkukkonen@google.com>

Author: jku

pyproject.toml

@@ -70,11 +70,6 @@ include = [
   "/setup.py",
 ]
 
-[tool.hatch.build.targets.wheel]
-# The testing phase changes the current working directory to `tests` but the test scripts import
-# from `tests` so the root directory must be added to Python's path for editable installations
-dev-mode-dirs = ["."]
-
 # Ruff section
 # Read more here: https://docs.astral.sh/ruff/linter/#rule-selection
 [tool.ruff]