[dist] Fix PEP8 F401

Which is in this case:
  `'pythonforandroid.util.current_directory' imported but unused`

Author: opacam

pythonforandroid/distribution.py

@@ -4,7 +4,7 @@
 from pathlib import Path
 
 from pythonforandroid.logger import (info, info_notify, warning, Err_Style, Err_Fore)
-from pythonforandroid.util import current_directory, BuildInterruptingException
+from pythonforandroid.util import BuildInterruptingException
 from shutil import rmtree