crypto/x509: remove the redundant type declaration

Change-Id: I50668a4c943ecab91b2b33370f6cfb3784afafd1
GitHub-Last-Rev: c8223adfc8b7d3fc712089bb9cb03d6832ab558b
GitHub-Pull-Request: golang/go#29654
Reviewed-on: https://go-review.googlesource.com/c/157338
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

src/crypto/x509/x509.go

@@ -1930,7 +1930,7 @@ func buildExtensions(template *Certificate, subjectIsEmpty bool, authorityKeyId
 			dp := distributionPoint{
 				DistributionPoint: distributionPointName{
 					FullName: []asn1.RawValue{
-						asn1.RawValue{Tag: 6, Class: 2, Bytes: []byte(name)},
+						{Tag: 6, Class: 2, Bytes: []byte(name)},
 					},
 				},
 			}