Remove test_otsu_lena_image
Remove test_otsu_lena_image

vighneshbirodkar/scikit-image,vighneshbirodkar/scikit-image,paalge/scikit-image,paalge/scikit-image,ofgulban/scikit-image,ofgulban/scikit-image,Hiyorimi/scikit-image,ajaybhat/scikit-image,ajaybhat/scikit-image,rjeli/scikit-image,Hiyorimi/scikit-image,pratapvardhan/scikit-image,paalge/scikit-image,pratapvardhan/scikit-image,rjeli/scikit-image,vighneshbirodkar/scikit-image,ofgulban/scikit-image,rjeli/scikit-image