core: remove setup.cfg, keep pytest.ini for convenience

core/pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+addopts = --pyargs trezorlib.tests.device_tests
+xfail_strict = true

core/setup.cfg

@@ -1,31 +0,0 @@
-[flake8]
-ignore =
-    # E203 whitespace before ':'
-    E203,
-    # E221: multiple spaces before operator
-    E221,
-    # E241: multiple spaces after ':'
-    E241,
-    # E402: module level import not at top of file
-    E402,
-    # E501: line too long
-    E501,
-    # E741 ambiguous variable name
-    E741,
-    # W503: line break before binary operator
-    W503
-
-[isort]
-multi_line_output = 3
-include_trailing_comma = True
-force_grid_wrap = 0
-combine_as_imports = True
-line_length = 88
-not_skip=__init__.py
-forced_separate = apps
-known_standard_library = micropython,ubinascii,ustruct,uctypes,utime,utimeq,trezorio,trezorui,trezorutils,trezorconfig
-
-[tool:pytest]
-addopts = --pyargs trezorlib.tests.device_tests
-xfail_strict = true
-run_xfail =