Suppress error logs from `CopilotCompletionProvider` when Copilot is disabled (#9826)
Marshall Bowers
created
This PR fixes some noisy error logs from the `CopilotCompletionProvider`
when Copilot is disabled entirely via the settings.
I have the following in my settings file:
```json
{
"features": {
"copilot": false
},
}
```
After #9777 I started seeing my Zed logs getting filled up with messages
like this:
```
[2024-03-26T14:33:09-04:00 ERROR util] crates/copilot_ui/src/copilot_completion_provider.rs:206: copilot is disabled
```
Release Notes:
- N/A