Revert "[telepathy-qt] Patch to build with Qt 5."

This reverts commit c54af7f7e3dce6b98b2da78202533221080a240f.
author: Tiago Salem Herrmann <tiago.herrmann@canonical.com>
message:
  force setInterfaces() on call-content.cpp, otherwise dtmf doesn't work
author: Gustavo Pichorim Boiko <gustavo.boiko@canonical.com>
message:
  Adapt it to work with Qt5 final.
author: Tiago Salem Herrmann <tiago.herrmann@canonical.com>
message:
  Add service side classes: