zeta: Revised data-collection onboarding experience (#24031)

Release Notes:

- N/A

---------

Co-authored-by: Danilo <danilo@zed.dev>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: João Marcos <marcospb19@hotmail.com>

crates/inline_completion/src/inline_completion.rs

@@ -21,8 +21,6 @@ pub struct InlineCompletion {
 pub enum DataCollectionState {
     /// The provider doesn't support data collection.
     Unsupported,
-    /// When there's a file not saved yet. In this case, we can't tell to which project it belongs.
-    Unknown,
     /// Data collection is enabled
     Enabled,
     /// Data collection is disabled or unanswered.
@@ -34,10 +32,6 @@ impl DataCollectionState {
         !matches!(self, DataCollectionState::Unsupported)
     }
 
-    pub fn is_unknown(&self) -> bool {
-        matches!(self, DataCollectionState::Unknown)
-    }
-
     pub fn is_enabled(&self) -> bool {
         matches!(self, DataCollectionState::Enabled)
     }