qtaguid.h - remove qtaguid_setPacifier declaration

There does not appear to be *any* implementation...

Additionally in a non-qtaguid eBPF world, this API simply appears meaningless...

cs/p:aosp-master qtaguid_setPacifier -file:system/core/libcutils/include.*/cutils/qtaguid[.]h$

finds nothing, except for:
  test/vts/specification/lib/ndk/bionic/1.0/libcutilsV1.vts

  api: {
    name: "qtaguid_setPacifier"
    return_type: {
      type: TYPE_SCALAR
      scalar_type: "int32_t"
    }
    arg: {
      type: TYPE_SCALAR
      scalar_type: "int32_t"
    }
  }

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I0b7def936920d4dacf90d6bb0a8efb7b09811c6a