Don't pass --quiet to coffeelint

Summary: This flag doesn't do anything when combined with `--reporter=checkstyle`.

Test Plan:
```
> coffeelint *.coffee
  ✗ fail.coffee
     ✗ #1: Class names should be camel cased. class name: boaConstrictor.
  ✓ pass.coffee

✗ Lint! » 1 error and 0 warnings in 2 files

> coffeelint --quiet *.coffee
  ✗ fail.coffee
     ✗ #1: Class names should be camel cased. class name: boaConstrictor.

✗ Lint! » 1 error and 0 warnings in 2 files

> coffeelint --reporter=checkstyle *.coffee
<?xml version="1.0" encoding="utf-8"?>
<checkstyle version="4.3">
<file name="fail.coffee">
<error line="1"
    severity="error"
    message="Class names should be camel cased; context: class name: boaConstrictor"
    source="coffeelint"/>
</file>
</checkstyle>

> coffeelint --reporter=checkstyle --quiet *.coffee
<?xml version="1.0" encoding="utf-8"?>
<checkstyle version="4.3">
<file name="fail.coffee">
<error line="1"
    severity="error"
    message="Class names should be camel cased; context: class name: boaConstrictor"
    source="coffeelint"/>
</file>
</checkstyle>
```

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11198

src/lint/linter/ArcanistCoffeeLintLinter.php

@@ -62,7 +62,6 @@ final class ArcanistCoffeeLintLinter extends ArcanistExternalLinter {
       '--reporter=checkstyle',
       '--color=never',
       '--noconfig',
-      '--quiet',
     );
 
     if ($this->config) {