remove obsolete import

Author: xcaruso

src/sage/rings/polynomial/skew_polynomial_finite_order.pyx

@@ -28,6 +28,7 @@ from sage.structure.element cimport RingElement
 from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
 from sage.rings.polynomial.skew_polynomial_element cimport SkewPolynomial_generic_dense
 
+
 cdef class SkewPolynomial_finite_order_dense(SkewPolynomial_generic_dense):
     def __init__(self, parent, x=None, int check=1, int construct=0, **kwds):
         """

src/sage/rings/polynomial/skew_polynomial_ring.py

@@ -1309,7 +1309,6 @@ def __init__(self, base_ring, twist_map, name, sparse, category=None):
 
             sage: TestSuite(S).run()
         """
-        from sage.rings.polynomial.skew_polynomial_finite_order import SkewPolynomial_finite_order_dense
         SkewPolynomialRing.__init__(self, base_ring, twist_map, name, sparse, category)
         self._order = twist_map.order()
         (self._constants, self._embed_constants) = twist_map.fixed_field()