fix lint workflow

Author: AlaaElattar

packages/signer/test/signer_test.dart

@@ -1,6 +1,5 @@
 import 'dart:typed_data';
 
-import 'package:polkadart_keyring/polkadart_keyring.dart';
 import 'package:signer/signer.dart';
 import 'package:test/test.dart';
 
@@ -18,16 +17,16 @@ void main() {
       await signer.fromMnemonic(mnemonic, KPType.ed25519);
       final data = 'dummyData';
 
-      final signature = await signer.sign(data);
+      final signature = signer.sign(data);
 
-      final isVerified = await signer.verify(signature, data);
+      final isVerified = signer.verify(signature, data);
       expect(isVerified, isTrue);
     });
 
     test('Test not initializing signer', () async {
       final data = 'dummyData';
       try {
-        await signer.sign(data);
+        signer.sign(data);
         fail('Expected an exception when signing with uninitialized signer.');
       } catch (e) {
         expect(e, isA<Exception>());
@@ -49,10 +48,10 @@ void main() {
       await signer.fromMnemonic(mnemonic, KPType.ed25519);
 
       final data = 'dummyData';
-      final signature = await signer.sign(data);
-      final modifiedSignature = signature + '00';
+      final signature = signer.sign(data);
+      final modifiedSignature = '${signature}00';
 
-      final isVerified = await signer.verify(modifiedSignature, data);
+      final isVerified = signer.verify(modifiedSignature, data);
       expect(isVerified, isFalse);
     });
 
@@ -63,7 +62,7 @@ void main() {
         148,
         202,
       ]);
-      expect(() async => await signer.fromSeed(invalidSeed, KPType.ed25519),
+      expect(() async => signer.fromSeed(invalidSeed, KPType.ed25519),
           throwsException);
     });
 
@@ -78,9 +77,9 @@ void main() {
       await signer.fromMnemonic(mnemonic, KPType.ed25519);
 
       final data = '';
-      final signature = await signer.sign(data);
+      final signature = signer.sign(data);
 
-      final isVerified = await signer.verify(signature, data);
+      final isVerified = signer.verify(signature, data);
       expect(isVerified, isTrue);
     });
 
@@ -90,10 +89,10 @@ void main() {
       await signer.fromMnemonic(mnemonic, KPType.ed25519);
 
       final originalData = 'originalData';
-      final signature = await signer.sign(originalData);
+      final signature = signer.sign(originalData);
 
       final differentData = 'differentData';
-      final isVerified = await signer.verify(signature, differentData);
+      final isVerified = signer.verify(signature, differentData);
       expect(isVerified, isFalse);
     });
   });