Preserving delimiters of string literals

I'm trying to print string literals without comments. I.e. if I have

``` js
'foo' // bar
```

I want to get

```
'foo'
```

However, recast prints

```
"foo"
```

I remove the comments by simply doing `node.comments.length = 0;`.

So my questions are:
- Is there a better way to remove comments?
- Is it possible to preserve the type of quotes in this case?

Start by tracing how recast handles comments and chooses quote delimiters when printing the JavaScript string literal in the example. Done means removing the trailing comment without mutating the literal's original single-quote delimiter, while clarifying whether node.comments.length = 0 is the supported removal approach.

Written by the indexing model from the issue text.