Unskip some linalg tests (#2559)

This PR suggests unskipping batch tests in linalg since oneMKL 2025.2
has been released and version 2025.1 is no longer relevant.
It also excludes `requires_intel_mkl_version` from coverage until it is
needed

Author: vlad-perevezentsev

dpnp/tests/helper.py

@@ -483,7 +483,7 @@ def numpy_version():
     return numpy.lib.NumpyVersion(numpy.__version__)
 
 
-def requires_intel_mkl_version(version):
+def requires_intel_mkl_version(version):  # pragma: no cover
     """
     Check if Intel MKL is used and its version is greater than or
     equal to the specified one.

dpnp/tests/test_linalg.py

@@ -25,7 +25,6 @@
     has_support_aspect64,
     is_cpu_device,
     numpy_version,
-    requires_intel_mkl_version,
 )
 from .third_party.cupy import testing
 
@@ -1747,10 +1746,6 @@ def test_inv_singular_matrix(self, matrix):
         assert_raises(numpy.linalg.LinAlgError, numpy.linalg.inv, a_np)
         assert_raises(dpnp.linalg.LinAlgError, dpnp.linalg.inv, a_dp)
 
-    # TODO: remove skipif when Intel MKL 2025.2 is released
-    @pytest.mark.skipif(
-        not requires_intel_mkl_version("2025.2"), reason="mkl<2025.2"
-    )
     def test_inv_singular_matrix_3D(self):
         a_np = numpy.array(
             [[[1, 2], [3, 4]], [[1, 2], [1, 2]], [[1, 3], [3, 1]]]
@@ -2766,13 +2761,6 @@ def test_slogdet_strides(self):
         assert_allclose(sign_result, sign_expected)
         assert_allclose(logdet_result, logdet_expected)
 
-    # TODO: remove skipif when Intel MKL 2025.2 is released
-    # Skip running on CPU because dpnp uses _getrf_batch only on CPU
-    # for dpnp.linalg.det/slogdet.
-    @pytest.mark.skipif(
-        is_cpu_device() and not requires_intel_mkl_version("2025.2"),
-        reason="mkl<2025.2",
-    )
     @pytest.mark.parametrize(
         "matrix",
         [
@@ -2803,13 +2791,6 @@ def test_slogdet_singular_matrix(self, matrix):
         assert_allclose(sign_result, sign_expected)
         assert_allclose(logdet_result, logdet_expected)
 
-    # TODO: remove skipif when Intel MKL 2025.2 is released
-    # Skip running on CPU because dpnp uses _getrf_batch only on CPU
-    # for dpnp.linalg.det/slogdet.
-    @pytest.mark.skipif(
-        is_cpu_device() and not requires_intel_mkl_version("2025.2"),
-        reason="mkl<2025.2",
-    )
     def test_slogdet_singular_matrix_3D(self):
         a_np = numpy.array(
             [[[1, 2], [3, 4]], [[1, 2], [1, 2]], [[1, 3], [3, 1]]]

dpnp/tests/third_party/cupy/linalg_tests/test_solve.py

@@ -7,7 +7,6 @@
 from dpnp.tests.helper import (
     assert_dtype_allclose,
     has_support_aspect64,
-    requires_intel_mkl_version,
 )
 from dpnp.tests.third_party.cupy import testing
 from dpnp.tests.third_party.cupy.testing import _condition
@@ -214,10 +213,6 @@ def test_inv(self, dtype):
             ):
                 xp.linalg.inv(a)
 
-    # TODO: remove skipif when Intel MKL 2025.2 is released
-    @pytest.mark.skipif(
-        not requires_intel_mkl_version("2025.2"), reason="mkl<2025.2"
-    )
     @testing.for_dtypes("ifdFD")
     def test_batched_inv(self, dtype):
         for xp in (numpy, cupy):