Remove the claim of the issue cause in the test case, as its not confirmed

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

Author: lambda-abstraction

stdlib/@tests/test_cases/sys/check_jit.py

@@ -7,6 +7,6 @@
     assert_type(sys._jit.is_active(), bool)
 
     def sys_is_not_a_package() -> None:
-        # This has to be put into a function, because otherwise pyright
-        # applies the type: ignore on the import sys._jit to the above usages of it
+        # This has to be put into a function, because otherwise the presence
+        # of this import statement causes errors on the above usages of `sys._jit`.
         import sys._jit  # type: ignore