Remove unused import

Author: vanitasvitae

pg/src/main/java/org/bouncycastle/openpgp/PGPSignature.java

@@ -19,7 +19,6 @@
 import org.bouncycastle.bcpg.SignatureSubpacket;
 import org.bouncycastle.bcpg.TrustPacket;
 import org.bouncycastle.math.ec.rfc8032.Ed25519;
-import org.bouncycastle.math.ec.rfc8032.Ed448;
 import org.bouncycastle.openpgp.operator.PGPContentVerifier;
 import org.bouncycastle.openpgp.operator.PGPContentVerifierBuilder;
 import org.bouncycastle.openpgp.operator.PGPContentVerifierBuilderProvider;