Remove workaround for bug 178048807.

Test: Manually modify `ArmVIXLAssemblerTest.VixlJniHelpers`
      to hit the workaround (disassembly changes when the
      workaround is modified). Remove the workaround and
      check that the disassembly does not change.
Bug: 178048807
Change-Id: I8688bcf95b751e14c7fe6e96a45df9a48c4976b3
1 file changed