Drop `colorValues` from Call wrapper
Drop `colorValues` from Call wrapper

This instance of `colorValues` is not used. There is a duplicated
`colorValues` definition in the inner `Builder` module.

Eslint detects this as:
```
    6:5   error  'colorValues' is assigned a value but never used  no-unused-vars
```

iFixit/node-markup,iFixit/node-markup,iFixit/node-markup