rgw/crypt - remote old parts path for sse attributes

rgw/crypt - remote old parts path for sse attributes

crypt_attribute_map is the place where sse attributes
should be found by the rest of the sse logic.  There is
no longer any need to feed "parts" down to the crypto
logic; this commit removes the old data path.

Signed-off-by: Marcus Watts <mwatts@redhat.com>
(cherry picked from commit 0dea74f5e6ddc5b13874bf5f294ad8cb3e3768b6)