__init__.py: Remove unnecessary return variables

src/tja2fumen/__init__.py

@@ -9,12 +9,8 @@ from tja2fumen.constants import COURSE_IDS
 
 
 def main(argv=None):
-    # NB: We want to return variables during testing, but not during CLI (or else they will be printed to stderr)
-    if argv:
-        return_vars = True
-    else:
+    if not argv:
         argv = sys.argv[1:]
-        return_vars = False
 
     parser = argparse.ArgumentParser(
         description="tja2fumen"
@@ -46,9 +42,6 @@ def main(argv=None):
         outputFilenames.append(outputName)
         writeFumen(outputName, fumenData)
 
-    if return_vars:
-        return parsedSongsTJA, parsedSongsFumen, outputFilenames
-
 
 # NB: This entry point is necessary for the Pyinstaller executable
 if __name__ == "__main__":