Remove identity scope information from jarsigner -verbose output

The identity scope information should be removed from the jarsigner -verbose output, ex:

$ jarsigner -verbose -verify HelloWorld-signed.jar

<snip>

  i = at least one certificate was found in identity scope

The IdentityScope class has been deprecated and marked for removal, and the jarsigner tool does not check this file so it is emitting information that it doesn't even support.