RFR: 8314059: Remove PKCS7.verify() [v2]

[Ben Perez]

> Removed PKCS7.verify() since no other code in JDK calls it.

Ben Perez has updated the pull request incrementally with one additional commit since the last revision:

  Updated copyright

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15251/files
  - new: https://git.openjdk.org/jdk/pull/15251/files/4ca757e1..4e34e6a6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15251&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15251&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15251.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15251/head:pull/15251

PR: https://git.openjdk.org/jdk/pull/15251