style: format code with Black and isort

This commit fixes the style issues introduced in 26d8835 according to the output
from Black and isort.

Details: #276

src/pyepal/pal/pal_neural_tangent.py

@@ -128,7 +128,6 @@ def __init__(self, *args, **kwargs):
     def _set_data(self):
         self.design_space = self.design_space_scaler.fit_transform(self.design_space)
         for i, _ in enumerate(self.models):
-
             predict_fn, scaler = _set_one_infinite_width_model(
                 i,
                 self.models,