diff --git a/packages/compiler-cli/src/main.ts b/packages/compiler-cli/src/main.ts
index 0c8eb8ddb8..88facc5587 100644
--- a/packages/compiler-cli/src/main.ts
+++ b/packages/compiler-cli/src/main.ts
@@ -172,7 +172,6 @@ export function readCommandLineAndConfiguration(
       emitFlags: api.EmitFlags.Default
     };
   }
-  const allDiagnostics: Diagnostics = [];
   const config = readConfiguration(project, cmdConfig.options);
   const options = {...config.options, ...existingOptions};
   if (options.locale) {