Fix build

Author: jlatusek

src/credentials/tests/TestFabricTable.cpp

@@ -1950,7 +1950,6 @@ TEST_F(TestFabricTable, TestUpdateNocFailSafe)
             MutableByteSpan nocSpan{ nocBuf };
             EXPECT_EQ(fabricTable.FetchNOCCert(1, nocSpan), CHIP_NO_ERROR);
 
-            Credentials::ChipCertificateSet certificates;
             EXPECT_EQ(certificates.Init(1), CHIP_NO_ERROR);
             EXPECT_EQ(certificates.LoadCert(nocSpan, BitFlags<CertDecodeFlags>(CertDecodeFlags::kIsTrustAnchor)), CHIP_NO_ERROR);
             Crypto::P256PublicKey nocPubKey(certificates.GetCertSet()[0].mPublicKey);