Revert "Support LSP 3.15"

This reverts commit fcccf8ec59420d20edc53f7d787f2412e297f5fe.

This causes rust-analyzer die immediatelly after startup

1 files changed, 1 insertions, 4 deletions

diff --git a/crates/ra_lsp_server/src/main_loop/handlers.rs b/crates/ra_lsp_server/src/main_loop/handlers.rs
index 5b64b27cd..409583634 100644
--- a/crates/ra_lsp_server/src/main_loop/handlers.rs
+++ b/crates/ra_lsp_server/src/main_loop/handlers.rs
@@ -648,7 +648,6 @@ pub fn handle_code_action(
             diagnostics: None,
             edit: None,
             command: Some(command),
-            is_preferred: None,
         };
         res.push(action.into());
     }
@@ -671,7 +670,6 @@ pub fn handle_code_action(
             diagnostics: None,
             edit: None,
             command: Some(command),
-            is_preferred: None,
         };
         res.push(action.into());
     }
@@ -830,10 +828,9 @@ pub fn publish_diagnostics(
             source: Some("rust-analyzer".to_string()),
             message: d.message,
             related_information: None,
-            tags: None,
         })
         .collect();
-    Ok(req::PublishDiagnosticsParams { uri, diagnostics, version: None })
+    Ok(req::PublishDiagnosticsParams { uri, diagnostics })
 }
 
 pub fn publish_decorations(