Remove deprecated evidence_to_proto function #669

Job	Run time
build_attest_all (buildconfigs/key_xor_test_app.sh)	16m 43s
build_attest_all (buildconfigs/oak_client_android_app.sh)	49m 2s
build_attest_all (buildconfigs/oak_containers_agent.sh)	10m 46s
build_attest_all (buildconfigs/oak_containers_kernel.sh)	33m 16s
build_attest_all (buildconfigs/oak_containers_orchestrator.sh)	24m 38s
build_attest_all (buildconfigs/oak_containers_stage1.sh)	23m 36s
build_attest_all (buildconfigs/oak_containers_syslogd.sh)	22m 2s
build_attest_all (buildconfigs/oak_containers_system_image.sh)	24m 46s
build_attest_all (buildconfigs/oak_containers_nvidia_system_image.sh)	26m 9s
build_attest_all (buildconfigs/oak_echo_enclave_app.sh)	17m 59s
build_attest_all (buildconfigs/oak_echo_raw_enclave_app.sh)	16m 46s
build_attest_all (buildconfigs/oak_functions_enclave_app.sh)	17m 35s
build_attest_all (buildconfigs/oak_functions_insecure_enclave_app.sh)	17m 45s
build_attest_all (buildconfigs/oak_orchestrator.sh)	17m 12s
build_attest_all (buildconfigs/oak_restricted_kernel_simple_io_init_rd_wrapper_bin.sh)	42m 12s
build_attest_all (buildconfigs/stage0_bin.sh)	42m 25s
build_attest_all (buildconfigs/stage0_bin_tdx.sh)	44m 7s
	7h 26m 59s

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