Remove reporting diagnostic support at SourceKitServer initialization

Sources/SourceKitLSP/SourceKitServer.swift

@@ -674,10 +674,7 @@ extension SourceKitServer {
         changeNotifications: .bool(true)
       )),
       callHierarchyProvider: .bool(true),
-      typeHierarchyProvider: .bool(true),
-      diagnosticProvider: DiagnosticOptions(
-        interFileDependencies: true,
-        workspaceDiagnostics: false)
+      typeHierarchyProvider: .bool(true)
     )
   }