Fix lint [skip ci]

src/pystencils/backend/kernelcreation/freeze.py

@@ -227,7 +227,6 @@ class FreezeExpressions:
         self._ctx.add_symbol_reduction_info(new_lhs_symb, reduction_info)
         self._ctx.replace_symbol(orig_lhs_symb, orig_lhs_symb_as_ptr)
 
-
         return PsAssignment(new_lhs, new_rhs)
 
     def map_Symbol(self, spsym: sp.Symbol) -> PsSymbolExpr:

src/pystencils/codegen/parameters.py

 from __future__ import annotations
 
 from warnings import warn
-from typing import Sequence, Iterable, Optional
+from typing import Sequence, Iterable
 
 from .properties import (
     PsSymbolProperty,

src/pystencils/compound_op_mapping.py

-from enum import Enum
 from operator import truediv, mul, sub, add
 
 from .backend.ast.expressions import PsExpression, PsCall