Fixed linter errors

pystencils/sympyextensions.py

@@ -10,7 +10,7 @@ from sympy.functions import Abs
 from sympy.core.numbers import Zero
 
 from pystencils.assignment import Assignment
-from pystencils.data_types import cast_func, get_base_type, get_type_of_expression, PointerType
+from pystencils.data_types import cast_func, get_type_of_expression, PointerType
 from pystencils.kernelparameters import FieldPointerSymbol
 
 T = TypeVar('T')
@@ -455,7 +455,6 @@ def count_operations(term: Union[sp.Expr, List[sp.Expr]],
     elif isinstance(term, Assignment):
         term = term.rhs
 
-
     def check_type(e):
         if only_type is None:
             return True