tests: storage: Drop duplicate tests with TEST_CHAIN
tests: storage: Drop duplicate tests with TEST_CHAIN

Now that all test cases with TEST_CHAIN were testing the same thing
twice drop one of them. Note that some of the cases were duplicate even
before dropping the image format probing tests.

Signed-off-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

libvirt/libvirt,nertpinx/libvirt,libvirt/libvirt,eskultety/libvirt,olafhering/libvirt,crobinso/libvirt,fabianfreyer/libvirt,crobinso/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,olafhering/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,crobinso/libvirt,zippy2/libvirt,zippy2/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,zippy2/libvirt,eskultety/libvirt,libvirt/libvirt,olafhering/libvirt,zippy2/libvirt,eskultety/libvirt,crobinso/libvirt,nertpinx/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,nertpinx/libvirt,libvirt/libvirt,jfehlig/libvirt,jfehlig/libvirt,jardasgit/libvirt,jfehlig/libvirt,nertpinx/libvirt,eskultety/libvirt,jardasgit/libvirt,andreabolognani/libvirt,olafhering/libvirt,jardasgit/libvirt,eskultety/libvirt,andreabolognani/libvirt,jardasgit/libvirt,jardasgit/libvirt,fabianfreyer/libvirt