RFR: 8348406: Remove tests GrantAllPermToExtWhenNoPolicy and PrincipalExpansionError from problem list

[Mikhail Yankelevich]

The following test files were deleted and has been removed from the problem list:
- sun/security/provider/PolicyFile/GrantAllPermToExtWhenNoPolicy.java
- sun/security/provider/PolicyParser/PrincipalExpansionError.java

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Commit messages:
 - JDK-8348406: Remove tests GrantAllPermToExtWhenNoPolicy and PrincipalExpansionError from problem list

Changes: https://git.openjdk.org/jdk/pull/23275/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23275&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348406
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23275.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23275/head:pull/23275

PR: https://git.openjdk.org/jdk/pull/23275