Rip out "diagnostic providers"

crates/language/src/language.rs

@@ -6,10 +6,9 @@ pub mod proto;
 mod tests;
 
 use anyhow::{anyhow, Result};
-use async_trait::async_trait;
 pub use buffer::Operation;
 pub use buffer::*;
-use collections::{HashMap, HashSet};
+use collections::HashSet;
 pub use diagnostic_set::DiagnosticEntry;
 use gpui::AppContext;
 use highlight_map::HighlightMap;
@@ -60,18 +59,9 @@ pub struct BracketPair {
     pub newline: bool,
 }
 
-#[async_trait]
-pub trait DiagnosticProvider: 'static + Send + Sync {
-    async fn diagnose(
-        &self,
-        path: Arc<Path>,
-    ) -> Result<HashMap<Arc<Path>, Vec<DiagnosticEntry<usize>>>>;
-}
-
 pub struct Language {
     pub(crate) config: LanguageConfig,
     pub(crate) grammar: Option<Arc<Grammar>>,
-    pub(crate) diagnostic_provider: Option<Arc<dyn DiagnosticProvider>>,
 }
 
 pub struct Grammar {
@@ -136,7 +126,6 @@ impl Language {
                     highlight_map: Default::default(),
                 })
             }),
-            diagnostic_provider: None,
         }
     }
 
@@ -170,11 +159,6 @@ impl Language {
         Ok(self)
     }
 
-    pub fn with_diagnostic_provider(mut self, source: impl DiagnosticProvider) -> Self {
-        self.diagnostic_provider = Some(Arc::new(source));
-        self
-    }
-
     pub fn name(&self) -> &str {
         self.config.name.as_str()
     }
@@ -208,10 +192,6 @@ impl Language {
         }
     }
 
-    pub fn diagnostic_provider(&self) -> Option<&Arc<dyn DiagnosticProvider>> {
-        self.diagnostic_provider.as_ref()
-    }
-
     pub fn disk_based_diagnostic_sources(&self) -> Option<&HashSet<String>> {
         self.config
             .language_server