Revert "Adding unit tests for exception classes"

Revert submission 1660319-java-util-concurrent-unit-tests-1

Reason for revert: Removing unit tests which cause too much divergence from upstream
Reverted Changes:
Idc905cc6b:Adding unit tests for exception classes
I700188e1d:Adding unit tests for ConcurrentSkipListSet
Ifa55996c2:Adding unit tests for ConcurrentSkipListMap
Ic2a58cae5:Adding unit tests for ConcurrentHashMap

Change-Id: I7b0828df7ed5f549adf734cf6808029649990d11
5 files changed