removed unnecessary use of @needs_python36 decorator

Author: alixdamman

larray/tests/test_array.py

@@ -4557,7 +4557,6 @@ def test_diag():
     assert d.i[1] == 1.0
 
 
-@needs_python36
 def test_matmul():
     # 2D / anonymous axes
     a1 = ndtest([Axis(3), Axis(3)])
@@ -4712,7 +4711,6 @@ def test_matmul():
     assert_array_equal(arr2d @ arr4d, res)
 
 
-@needs_python36
 def test_rmatmul():
     a1 = eye(3) * 2
     a2 = ndtest([Axis(3), Axis(3)])
@@ -5070,7 +5068,6 @@ def test_stack():
     assert_array_equal(res, expected)
 
 
-@needs_python36
 def test_stack_kwargs_no_axis_labels():
     # these tests rely on kwargs ordering, hence python 3.6