Removing copy with primitive arrays in Unsafe

The copy memory with primitive arrays are no longer used
anywhere, so there is no point in having them in the new
jdk.internal.misc.Unsafe class.

Bug: 203762565
Test: art/test/testrunner/testrunner.py -t 2235-JdkUnsafeTest
Change-Id: Iebe88fdfd37bdd337a9573cabf5661eefa03cdb8
2 files changed