Revert "[ThreadManager] Handle the case when starting a thread fails"
Revert "[ThreadManager] Handle the case when starting a thread fails"

Summary: This reverts commit cbb4eefda32431bfa2892ef403e5c152a8773862.

Test Plan: None

Reviewed By: mshneer@fb.com

Subscribers: alandau, bmatheny

FB internal diff: D1440563

chjp2046/fbthrift,Orvid/fbthrift,chjp2046/fbthrift,fengshao0907/fbthrift,raphaelamorim/fbthrift,sinjar666/fbthrift,jesboat/fbthrift,Orvid/fbthrift,raphaelamorim/fbthrift,LinusU/fbthrift,LinusU/fbthrift,raphaelamorim/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,fengshao0907/fbthrift,getyourguide/fbthrift,maxwell-demon/fbthrift,facebook/fbthrift,kangkot/fbthrift,sinjar666/fbthrift,fengshao0907/fbthrift,sinjar666/fbthrift,getyourguide/fbthrift,facebook/fbthrift,fengshao0907/fbthrift,uber/fbthrift,project-zerus/fbthrift,soumith/fbthrift,facebook/fbthrift,jesboat/fbthrift,jesboat/fbthrift,getyourguide/fbthrift,SergeyMakarenko/fbthrift,project-zerus/fbthrift,raphaelamorim/fbthrift,kangkot/fbthrift,kangkot/fbthrift,getyourguide/fbthrift,raphaelamorim/fbthrift,project-zerus/fbthrift,sinjar666/fbthrift,SergeyMakarenko/fbthrift,uber/fbthrift,SergeyMakarenko/fbthrift,project-zerus/fbthrift,sinjar666/fbthrift,LinusU/fbthrift,soumith/fbthrift,guker/fbthrift,uber/fbthrift,uber/fbthrift,soumith/fbthrift,Orvid/fbthrift,HankFaan/fbthrift,uber/fbthrift,guker/fbthrift,Orvid/fbthrift,sinjar666/fbthrift,kangkot/fbthrift,soumith/fbthrift,jesboat/fbthrift,uber/fbthrift,maxwell-demon/fbthrift,guker/fbthrift,chjp2046/fbthrift,fengshao0907/fbthrift,getyourguide/fbthrift,HankFaan/fbthrift,SergeyMakarenko/fbthrift,jesboat/fbthrift,project-zerus/fbthrift,HankFaan/fbthrift,getyourguide/fbthrift,HankFaan/fbthrift,getyourguide/fbthrift,LinusU/fbthrift,chjp2046/fbthrift,soumith/fbthrift,HankFaan/fbthrift,HankFaan/fbthrift,chjp2046/fbthrift,kangkot/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,facebook/fbthrift,fengshao0907/fbthrift,getyourguide/fbthrift,chjp2046/fbthrift,kangkot/fbthrift,maxwell-demon/fbthrift,guker/fbthrift,LinusU/fbthrift,jesboat/fbthrift,Orvid/fbthrift,jesboat/fbthrift,soumith/fbthrift,project-zerus/fbthrift,maxwell-demon/fbthrift,Orvid/fbthrift,soumith/fbthrift,kangkot/fbthrift,raphaelamorim/fbthrift,LinusU/fbthrift,getyourguide/fbthrift,facebook/fbthrift,maxwell-demon/fbthrift,Orvid/fbthrift,facebook/fbthrift,HankFaan/fbthrift,jesboat/fbthrift,chjp2046/fbthrift,maxwell-demon/fbthrift,uber/fbthrift,jesboat/fbthrift,maxwell-demon/fbthrift,soumith/fbthrift,guker/fbthrift,soumith/fbthrift,kangkot/fbthrift,LinusU/fbthrift,fengshao0907/fbthrift,uber/fbthrift,sinjar666/fbthrift,facebook/fbthrift,project-zerus/fbthrift,jesboat/fbthrift,uber/fbthrift,chjp2046/fbthrift,Orvid/fbthrift,Orvid/fbthrift,Orvid/fbthrift,guker/fbthrift,HankFaan/fbthrift,fengshao0907/fbthrift,sinjar666/fbthrift,soumith/fbthrift,guker/fbthrift,sinjar666/fbthrift,HankFaan/fbthrift,kangkot/fbthrift,SergeyMakarenko/fbthrift,project-zerus/fbthrift,uber/fbthrift,fengshao0907/fbthrift,getyourguide/fbthrift,guker/fbthrift,SergeyMakarenko/fbthrift,sinjar666/fbthrift,getyourguide/fbthrift,jesboat/fbthrift,LinusU/fbthrift,SergeyMakarenko/fbthrift,raphaelamorim/fbthrift,maxwell-demon/fbthrift,chjp2046/fbthrift,SergeyMakarenko/fbthrift,guker/fbthrift,project-zerus/fbthrift,SergeyMakarenko/fbthrift,chjp2046/fbthrift,chjp2046/fbthrift,raphaelamorim/fbthrift,HankFaan/fbthrift,HankFaan/fbthrift,project-zerus/fbthrift,LinusU/fbthrift,raphaelamorim/fbthrift,maxwell-demon/fbthrift,sinjar666/fbthrift,soumith/fbthrift,uber/fbthrift,facebook/fbthrift,project-zerus/fbthrift,guker/fbthrift,maxwell-demon/fbthrift,guker/fbthrift,kangkot/fbthrift,getyourguide/fbthrift,LinusU/fbthrift,SergeyMakarenko/fbthrift,raphaelamorim/fbthrift,uber/fbthrift,project-zerus/fbthrift,raphaelamorim/fbthrift,Orvid/fbthrift,kangkot/fbthrift,maxwell-demon/fbthrift,jesboat/fbthrift,chjp2046/fbthrift,LinusU/fbthrift,facebook/fbthrift