Fix: redundant import of yasna::models::ObjectIdentifier

Author: Gabgobie

rcgen/src/certificate.rs

@@ -825,8 +825,6 @@ pub struct PolicyInformation {
 
 impl yasna::DEREncodable for PolicyInformation {
 	fn encode_der<'a>(&self, writer: DERWriter<'a>) {
-		use yasna::models::ObjectIdentifier;
-
 		writer.write_sequence(|writer| {
 			writer
 				.next()
@@ -1007,8 +1005,6 @@ impl PolicyQualifierInfo {
 
 impl yasna::DEREncodable for PolicyQualifierInfo {
 	fn encode_der<'a>(&self, writer: DERWriter<'a>) {
-		use yasna::models::ObjectIdentifier;
-
 		writer.write_sequence(|writer| {
 			writer
 				.next()