Revert fitEffAcc_hf_trigger.cc

Revert to fitEffAcc_hf_trigger.cc from:
1fd4fbabea8209c2898427f095614c820fb61a78

This version uses the "hand fit smearing".
Add HF Trigger Efficiency with hand adjustment

This one adjusts the mean of the HF smearing by hand to get the peak in
the right place. The other parameters are left at the values found by
Kevin.