test: Remove invalid unit test

test: Remove invalid unit test

This test was talking about testing invalid ops, however with the inclusion of sync reads in EC (https://github.com/ceph/ceph/pull/67079), it is valid to perform class reads in EC. In addition, work was done around illegal ops here: https://github.com/ceph/ceph/pull/66258 and the existance of TEST(ClsHello, BadMethods) in test_cls_hello.cc covers illegal ops in that PR leading me to think this is unneccisairy. Because of these reasons, I think its better this test is removed as it is incorrect and also not working.

Signed-off-by: Jon Bailey <jonathan.bailey1@ibm.com>
(cherry picked from commit b05cfd16126527cb4178130344334f8dee1f3748)