Cleanup unused easyblocks

[branfosj]

In #3089 we've cleaned up unused easyblocks instead of converting the run_cmd / run_cmd_qa use to run_shell_cmd. There is a list of easyblocks that do not use run_cmd / run_cmd_qa, this is the ones that are unused and remove them.

Need to check for indirect use of these (via EB_XYZ)

[boegel]

@branfosj Is this done now?

[branfosj]

@branfosj Is this done now?

Do you mean this or #3089?

I'd forgotten about this one. I've not finished checking for unused blocks or creating the PRs to remove the unused ones yet. I'll revisit this soon.

[branfosj]

Done in #3423