Remove the cc_library targets from tink_pybind_extension.
Remove the cc_library targets from tink_pybind_extension.

These were used when we had multiple "tink_pybind_extension" targets, but not removed when we migrated to use a single one.

PiperOrigin-RevId: 421760889

google/tink,google/tink,google/tink,google/tink,google/tink,google/tink,google/tink,google/tink