Removed a bad tests: the matcher uses and requires implicit hydrogens explicitly, and the test does not have them; the testFindMatchingAtomType_IAtomContainer_IAtom() does and works find

Change-Id: Ife8c9e385f4bc4d73a5027d6a3bc5ab4a9af1d19
Signed-off-by: John May <john.wilkinsonmay@gmail.com>