crypto: remove unneeded guard committed

createCFRGRaw() will always return an object. The error for an undefined
return value will never occur.

Author: Trott

lib/internal/crypto/cfrg.js

@@ -291,8 +291,6 @@ async function cfrgImportKey(
     case 'raw': {
       verifyAcceptableCfrgKeyUse(name, 'public', usagesSet);
       keyObject = createCFRGRawKey(name, keyData, true);
-      if (keyObject === undefined)
-        throw lazyDOMException('Unable to import CFRG key', 'OperationError');
       break;
     }
   }

lib/internal/crypto/keys.js

@@ -85,7 +85,7 @@ for (const m of [[kKeyEncodingPKCS1, 'pkcs1'], [kKeyEncodingPKCS8, 'pkcs8'],
   encodingNames[m[0]] = m[1];
 
 // Creating the KeyObject class is a little complicated due to inheritance
-// and that fact that KeyObjects should be transferrable between threads,
+// and the fact that KeyObjects should be transferrable between threads,
 // which requires the KeyObject base class to be implemented in C++.
 // The creation requires a callback to make sure that the NativeKeyObject
 // base class cannot exist without the other KeyObject implementations.