Remove OSC upgrade code that was making bad assumptions
Remove OSC upgrade code that was making bad assumptions

The code wasn't needed, as it turns out the erchef API will just do the
right thing, so long as a simple schema change is put in place so the EC
password type has also has the OSC hash type in it. Otherwise erchef
handles it all perfectly.

poliva83/chef-server,Minerapp/chef-server,stephenbm/chef-server,vladuemilian/chef-server,itmustbejj/chef-server,rmoorman/chef-server,Minerapp/chef-server,stephenbm/chef-server,chef/opscode-omnibus,vladuemilian/chef-server,itmustbejj/chef-server,charlesjohnson/chef-server,poliva83/chef-server,charlesjohnson/chef-server,marcparadise/chef-server,chef/chef-server,marcparadise/chef-server,Minerapp/chef-server,stephenbm/chef-server,chef/chef-server,itmustbejj/chef-server,chef/chef-server,poliva83/chef-server,poliva83/chef-server,itmustbejj/chef-server,vladuemilian/chef-server,juliandunn/chef-server-1,vladuemilian/chef-server,chef/chef-server,rmoorman/chef-server,poliva83/chef-server,stephenbm/chef-server,juliandunn/chef-server-1,chef/opscode-omnibus,charlesjohnson/chef-server,chef/opscode-omnibus,chef/chef-server,Minerapp/chef-server,juliandunn/chef-server-1,marcparadise/chef-server,stephenbm/chef-server,vladuemilian/chef-server,chef/opscode-omnibus,charlesjohnson/chef-server,juliandunn/chef-server-1,chef/chef-server,rmoorman/chef-server,juliandunn/chef-server-1,marcparadise/chef-server,rmoorman/chef-server,Minerapp/chef-server,charlesjohnson/chef-server,marcparadise/chef-server,itmustbejj/chef-server,rmoorman/chef-server