[#83023864] remove empty text column add hard coded string

Made a reek config as well to ignore requiring comments on random methods.

Pre-commit ran me for a loop so there are some other refactors in there that are tangential.

Delete unneeded specs
Is this file still needed? It doesn't seem to have a whole lot that's not also in `FlowQuery#flow_map`. Maybe we can satisfy the functionality `FlowTemplate` provides by a class method on `FlowQuery`?