Remove test/ossl_shim/Makefile
Remove test/ossl_shim/Makefile

This Makefile was temporary. Building ossl_shim has now been integrated into
to the build system.

Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl