Remove lingering documentation references to DynamoController, dynSettings, dynRevitSettings

### Aim

Some of the comments still refer to `DynamoController`, `dynSettings`, or `dynRevitSettings`.  This pull request removes those.

### Proof

```
Find all "dynSettings", Whole word, Subfolders, Find Results 1, Entire Solution, ""
Matching lines: 0    Matching files: 0    Total files searched: 990

Find all "dynRevitSettings", Whole word, Subfolders, Find Results 1, Entire Solution, ""
Matching lines: 0    Matching files: 0    Total files searched: 990

Find all "DynamoController", Whole word, Subfolders, Find Results 1, Entire Solution, ""
Matching lines: 0    Matching files: 0    Total files searched: 990
```
### Reviewers

@Benglin
There's another one in ```DynamoViewModel.cs``` it seems :)

Come to think about it, since this is now an NO-OP, why don't we remove it along with all its ```SelectVisualizationInViewCommand```? That does look like a slightly larger work, but if you feel like killing it all, it's a nicely target for the day :)