Remove unused import and variable in __init__.py

Author: BenjaminMidtvedt

deeptrack/__init__.py

@@ -61,6 +61,7 @@
     from . import visualization
     from . import pytorch
     from . import deeplay
+del should_import
 
 from deeptrack import (
     image,
@@ -69,5 +70,3 @@
     # Fake imports for IDE autocomplete
     # Does not actually import anything
 )
-
-__all__ = ()