Remove src prefix in coverage config

pyproject.toml

@@ -229,11 +229,11 @@ source_pkgs = ["trio"]
 omit = [
     # These are run in subprocesses, but still don't work. We follow
     # coverage's documentation to no avail.
-    "*/src/trio/_core/_tests/test_multierror_scripts/*",
+    "*/trio/_core/_tests/test_multierror_scripts/*",
     # Omit the generated files in trio/_core starting with _generated_
-    "*/src/trio/_core/_generated_*",
+    "*/trio/_core/_generated_*",
     # Script used to check type completeness that isn't run in tests
-    "*/src/trio/_tests/check_type_completeness.py",
+    "*/trio/_tests/check_type_completeness.py",
 ]
 # The test suite spawns subprocesses to test some stuff, so make sure
 # this doesn't corrupt the coverage files