8198539: Cleanup of unused imports in java/util/jar/Attributes.java (java.base) and JdpController.java (jdk.management.agent)
Reviewed-by: stuefe
^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
\.DS_Store
\.metadata/
\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
.*/JTreport/.*
.*/JTwork/.*