build: Replace isort with ruff.

Drop the direct isort requirement and migrate the isort config to ruff
config.

Author: feanil

pyproject.toml

@@ -213,7 +213,7 @@ exclude = [
 ]
 
 [tool.ruff.lint]
-select = ["E", "W"]
+select = ["E", "W", "I"]
 ignore = [
     "E402",  # module level import not at top of file
     "E501",  # line too long (pylint enforces this at 120 chars while ignoring trailing comments)
@@ -226,12 +226,6 @@ ignore = [
     "E721",  # use `isinstance()` for type comparisons
 ]
 
-[tool.isort]
-indent = "    "
-line_length = 120
-multi_line_output = 3
-skip = ["envs", "migrations"]
-
 [tool.importlinter]
 root_packages = ["lms", "cms", "openedx", "openedx_content", "openedx_catalog"]
 include_external_packages = true

requirements/edx/testing.in

@@ -27,7 +27,6 @@ factory-boy               # Library for creating test fixtures, used in many tes
 freezegun                 # Allows tests to mock the output of assorted datetime module functions
 httpretty                 # Library for mocking HTTP requests, used in many tests
 import-linter             # Tool for making assertions about which modules can import which others
-isort                     # For checking and fixing the order of imports
 mock                      # Deprecated alias to standard library `unittest.mock`
 ruff                      # Fast Python linter and formatter
 polib                     # Library for manipulating gettext translation files, used to test paver i18n commands

requirements/edx/testing.txt

@@ -865,9 +865,7 @@ isodate==0.7.2
     #   -r requirements/edx/base.txt
     #   python3-saml
 isort==8.0.1
-    # via
-    #   -r requirements/edx/testing.in
-    #   pylint
+    # via pylint
 jinja2==3.1.6
     # via
     #   -r requirements/edx/base.txt