Cleanup; fixes #947. (#948)

* Cleanup; fixes #947.

* Mypy cleaning.

* Linter cleanup

* Fixed tests.

Author: emeryberger

scalene/__main__.py

@@ -1,14 +1,6 @@
 import sys
 import traceback
 
-from scalene import scalene_profiler
-
-
-def should_trace(s: str) -> bool:
-    if scalene_profiler.Scalene.is_done():
-        return False
-    return scalene_profiler.Scalene.should_trace(s)
-
 
 def main() -> None:
     try: