Revert "Adding unit tests for ConcurrentHashMap"

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: I76f2b11dc2574e6230fe74bc41563527a97660d4
1 file changed