lsp: Always report innermost workspace_folders (#36407)

Closes #ISSUE

Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/language/src/language.rs

@@ -283,15 +283,6 @@ impl CachedLspAdapter {
     }
 }
 
-/// Determines what gets sent out as a workspace folders content
-#[derive(Clone, Copy, Debug, PartialEq)]
-pub enum WorkspaceFoldersContent {
-    /// Send out a single entry with the root of the workspace.
-    WorktreeRoot,
-    /// Send out a list of subproject roots.
-    SubprojectRoots,
-}
-
 /// [`LspAdapterDelegate`] allows [`LspAdapter]` implementations to interface with the application
 // e.g. to display a notification or fetch data from the web.
 #[async_trait]
@@ -580,13 +571,6 @@ pub trait LspAdapter: 'static + Send + Sync {
         Ok(original)
     }
 
-    /// Determines whether a language server supports workspace folders.
-    ///
-    /// And does not trip over itself in the process.
-    fn workspace_folders_content(&self) -> WorkspaceFoldersContent {
-        WorkspaceFoldersContent::SubprojectRoots
-    }
-
     /// Method only implemented by the default JSON language server adapter.
     /// Used to provide dynamic reloading of the JSON schemas used to
     /// provide autocompletion and diagnostics in Zed setting and keybind