Fix lint

ColCarroll · ColCarroll · commit 1b7cd6f2cbc5 · 2019-11-16T19:45:16.000-05:00
diff --git a/pymc3/distributions/timeseries.py b/pymc3/distributions/timeseries.py
@@ -6,7 +6,6 @@
 from .continuous import get_tau_sigma, Normal, Flat
 from . import multivariate
 from . import distribution
-from .shape_utils import to_tuple
 
 
 __all__ = [
