run-tests.py: removed fixed expr_usual_conversions.c from exclusion list

Author: firewave

run-tests.py

@@ -82,7 +82,6 @@ def cleanup(out: str) -> str:
          # todo, high priority
          'c99-6_10_3_4_p5.c',
          'c99-6_10_3_4_p6.c',
-         'expr_usual_conversions.c', # condition is true: 4U - 30 >= 0
          'stdint.c',
 
          # GCC..