Summary
Remove trace logging.

Background & Motivation

Example of trace logging:

if (ctx->crypt->log.trace_enabled) {
    char *cmd_val;
    cmd_val = _mongocrypt_new_json_string_from_binary(msg);
    _mongocrypt_log(&ctx->crypt->log, MONGOCRYPT_LOG_LEVEL_TRACE, "%s (%s=\"%s\")", BSON_FUNC, "msg", cmd_val);
    bson_free(cmd_val);
}

Trace logging is enabled by both:

• At compile-time: use the CMake option ENABLE_TRACE=ON
• At run-time: set the environment variable MONGOCRYPT_TRACE=ON

https://github.com/mongodb/libmongocrypt/pull/976/ is a report of a build error when configuring with ENABLE_TRACE=ON.

This ticket proposes removing trace logging. The libmongocrypt binaries drivers include are not built with ENABLE_TRACE=ON. I expect it is unused, untested, and (IMO) not worth keeping.