4.4 - use core aws lib instead of local_aws

[aspark21]

catalyst/moodle-local_aws#69

Will you create a new 4.4 branch of this plugin for this?

[danmarsden]

@aspark21 - not sure what you mean there - AWS is now in core, so you shouldn't need to use this plugin at all in 4.4 and higher. There could be changes required to other plugins that rely on this one though?

[danmarsden]

ah - sorry - was confused by the fact that you've added this issue in objectfs but linked to the issue in aws plugin - If someone sends through a pull request that makes the objectfs plugin use the core aws lib we'll create a new branch if needed.