RFR: 8294038: Remove "Classpath" exception from javax/swing tests

[Alexey Ivanov]

Remove *the "Classpath" exception* from tests in `javax/swing`. The tests should not have it.

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Commit messages:
 - 8294038: Remove "Classpath" exception from javax/swing tests
 - 8294038: Remove "Classpath" exception from javax/swing tests

Changes: https://git.openjdk.org/jdk/pull/10360/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10360&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294038
  Stats: 34 lines in 11 files changed: 0 ins; 23 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/10360.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10360/head:pull/10360

PR: https://git.openjdk.org/jdk/pull/10360