Remove unused imports under test/lib and jtreg/gc. They create lots of warnings if editing using an IDE. Tests in hotspot_gc passed.
------------- Commit messages: - 8281585: Remove unused imports under test/lib and jtreg/gc Changes: https://git.openjdk.java.net/jdk/pull/7426/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7426&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8281585 Stats: 92 lines in 60 files changed: 0 ins; 92 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/7426.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7426/head:pull/7426 PR: https://git.openjdk.java.net/jdk/pull/7426
