Update CryptoProvider.ts

Author: Prithvi Kanherkar

lib/msal-node/src/crypto/CryptoProvider.ts

@@ -3,7 +3,7 @@
  * Licensed under the MIT License.
  */
 
-import { ICrypto, PkceCodes, SignedHttpRequest } from '@azure/msal-common';
+import { ICrypto, PkceCodes } from '@azure/msal-common';
 import { GuidGenerator } from './GuidGenerator';
 import { EncodingUtils } from './../utils/EncodingUtils';
 import { PkceGenerator } from './PkceGenerator';