Both `javax/script/PluggableContextTest.java` and its companion `test/jdk/javax/script/MyContext.java` were added in [JDK-6398614](https://bugs.openjdk.org/browse/JDK-6398614). [JDK-8246113](https://bugs.openjdk.org/browse/JDK-8246113) removed `PluggableContextTest`, yet forgot `MyContext`, and rendered it redundant. Remove `MyContext` too.
------------- Commit messages: - Remove unused `test/jdk/javax/script/MyContext.java` Changes: https://git.openjdk.org/jdk/pull/25748/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25748&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8359225 Stats: 222 lines in 1 file changed: 0 ins; 222 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/25748.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/25748/head:pull/25748 PR: https://git.openjdk.org/jdk/pull/25748
