message: In miniapps/adjoint, remove the unnecessary dependency on
  'mfem-common' from the CMake file as well.
diff: add_mfem_miniapp(cvsRoberts_ASAi_dns
  MAIN cvsRoberts_ASAi_dns.cpp
  - LIBRARIES mfem mfem-common)
  + LIBRARIES mfem)
  if (MFEM_USE_MPI)
  add_mfem_miniapp(adjoint_advection_diffusion
  MAIN adjoint_advection_diffusion.cpp
  - LIBRARIES mfem mfem-common)
  + LIBRARIES mfem)
  endif()
  