src/sage/rings/polynomial/multi_polynomial_libsingular.pyx: Fix import

Author: Matthias Koeppe

src/sage/rings/polynomial/multi_polynomial_libsingular.pyx

@@ -243,7 +243,6 @@ from sage.structure.richcmp cimport rich_to_bool, richcmp
 from sage.structure.factorization import Factorization
 from sage.structure.sequence import Sequence
 
-from sage.interfaces.macaulay import macaulay2
 from sage.interfaces.singular import singular as singular_default, is_SingularElement, SingularElement
 from sage.interfaces.macaulay2 import macaulay2 as macaulay2_default, is_Macaulay2Element