code_server: Tighten type of modules parameters
code_server: Tighten type of modules parameters

The following functions in the 'code' module only allow the
module argument to an atom:

  load_file/1
  load_binary/3
  ensure_loaded/1
  delete/1
  purge/1
  soft_purge/1
  get_object_code/1

Therefore, there is no reason that the corresponding implementation in
code_server should allow the module to be either an atom or a
string. Only accept an atom and remove the helper functions to_atom/1
and do_mod_call/4.

ferd/otp,potatosalad/otp,g-andrade/otp,bugs-erlang-org/otp,erlang/otp,ahmedshafeeq/otp,tuncer/otp,electricimp/otp,goertzenator/otp,getong/otp,rlipscombe/otp,basho/otp,getong/otp,lemenkov/otp,bsmr-erlang/otp,goertzenator/otp,tuncer/otp,lemenkov/otp,potatosalad/otp,dgud/otp,jj1bdx/otp,vinoski/otp,dgud/otp,vladdu/otp,kvakvs/otp,bjorng/otp,bugs-erlang-org/otp,lrascao/otp,RaimoNiskanen/otp,dgud/otp,ahmedshafeeq/otp,weisslj/otp,emacsmirror/erlang,bsmr-erlang/otp,neeraj9/otp,release-project/otp,ferd/otp,dumbbell/otp,bsmr-erlang/otp,vinoski/otp,saleyn/otp,vladdu/otp,lightcyphers/otp,mikpe/otp,jj1bdx/otp,falkevik/otp,lemenkov/otp,dumbbell/otp,basho/otp,kvakvs/otp,falkevik/otp,kvakvs/otp,legoscia/otp,goertzenator/otp,isvilen/otp,massemanet/otp,aboroska/otp,release-project/otp,bsmr-erlang/otp,matwey/otp,bernardd/otp,bjorng/otp,lrascao/otp,rlipscombe/otp,electricimp/otp,psyeugenic/otp,g-andrade/otp,goertzenator/otp,jj1bdx/otp,bsmr-erlang/otp,weisslj/otp,bjorng/otp,saleyn/otp,vladdu/otp,massemanet/otp,bernardd/otp,dgud/otp,saleyn/otp,aboroska/otp,mikpe/otp,weisslj/otp,kvakvs/otp,falkevik/otp,vladdu/otp,dumbbell/otp,lrascao/otp,bugs-erlang-org/otp,rlipscombe/otp,dgud/otp,erlang/otp,jj1bdx/otp,RoadRunnr/otp,falkevik/otp,ahmedshafeeq/otp,erlang/otp,potatosalad/otp,falkevik/otp,tuncer/otp,ahmedshafeeq/otp,dgud/otp,kvakvs/otp,lightcyphers/otp,bugs-erlang-org/otp,psyeugenic/otp,g-andrade/otp,massemanet/otp,uabboli/otp,release-project/otp,cobusc/otp,tuncer/otp,lemenkov/otp,goertzenator/otp,ferd/otp,basho/otp,fenollp/otp,psyeugenic/otp,RoadRunnr/otp,isvilen/otp,vladdu/otp,emile/otp,emacsmirror/erlang,RoadRunnr/otp,vinoski/otp,dgud/otp,lemenkov/otp,aboroska/otp,ferd/otp,weisslj/otp,basho/otp,lemenkov/otp,psyeugenic/otp,lrascao/otp,lightcyphers/otp,rlipscombe/otp,emile/otp,g-andrade/otp,uabboli/otp,g-andrade/otp,RaimoNiskanen/otp,legoscia/otp,emacsmirror/erlang,bsmr-erlang/otp,vinoski/otp,getong/otp,g-andrade/otp,potatosalad/otp,bernardd/otp,dgud/otp,kvakvs/otp,release-project/otp,RoadRunnr/otp,bernardd/otp,jj1bdx/otp,bernardd/otp,bjorng/otp,ahmedshafeeq/otp,RoadRunnr/otp,RoadRunnr/otp,mikpe/otp,ahmedshafeeq/otp,dumbbell/otp,lrascao/otp,psyeugenic/otp,bugs-erlang-org/otp,ferd/otp,uabboli/otp,tuncer/otp,dumbbell/otp,uabboli/otp,erlang/otp,neeraj9/otp,cobusc/otp,rlipscombe/otp,aboroska/otp,saleyn/otp,rlipscombe/otp,vladdu/otp,mikpe/otp,cobusc/otp,lightcyphers/otp,cobusc/otp,neeraj9/otp,neeraj9/otp,massemanet/otp,jj1bdx/otp,electricimp/otp,bjorng/otp,erlang/otp,ferd/otp,erlang/otp,legoscia/otp,neeraj9/otp,bjorng/otp,erlang/otp,jj1bdx/otp,saleyn/otp,fenollp/otp,RaimoNiskanen/otp,potatosalad/otp,electricimp/otp,g-andrade/otp,kvakvs/otp,g-andrade/otp,ahmedshafeeq/otp,bugs-erlang-org/otp,electricimp/otp,fenollp/otp,uabboli/otp,goertzenator/otp,bernardd/otp,release-project/otp,kvakvs/otp,dumbbell/otp,uabboli/otp,basho/otp,emacsmirror/erlang,goertzenator/otp,saleyn/otp,RoadRunnr/otp,fenollp/otp,emile/otp,tuncer/otp,neeraj9/otp,psyeugenic/otp,aboroska/otp,cobusc/otp,fenollp/otp,rlipscombe/otp,bugs-erlang-org/otp,mikpe/otp,jj1bdx/otp,lemenkov/otp,massemanet/otp,isvilen/otp,RaimoNiskanen/otp,isvilen/otp,vladdu/otp,massemanet/otp,isvilen/otp,massemanet/otp,ferd/otp,lrascao/otp,release-project/otp,RaimoNiskanen/otp,lightcyphers/otp,vinoski/otp,g-andrade/otp,bjorng/otp,basho/otp,matwey/otp,vinoski/otp,mikpe/otp,ferd/otp,getong/otp,matwey/otp,matwey/otp,lrascao/otp,getong/otp,bjorng/otp,lrascao/otp,emile/otp,basho/otp,matwey/otp,lightcyphers/otp,legoscia/otp,saleyn/otp,legoscia/otp,vinoski/otp,mikpe/otp,fenollp/otp,mikpe/otp,lightcyphers/otp,isvilen/otp,dumbbell/otp,tuncer/otp,weisslj/otp,basho/otp,dumbbell/otp,weisslj/otp,getong/otp,getong/otp,legoscia/otp,psyeugenic/otp,matwey/otp,legoscia/otp,erlang/otp,falkevik/otp,RoadRunnr/otp,matwey/otp,isvilen/otp,isvilen/otp,getong/otp,electricimp/otp,cobusc/otp,goertzenator/otp,electricimp/otp,dumbbell/otp,massemanet/otp,electricimp/otp,bugs-erlang-org/otp,isvilen/otp,emacsmirror/erlang,getong/otp,fenollp/otp,saleyn/otp,goertzenator/otp,emacsmirror/erlang,fenollp/otp,uabboli/otp,vinoski/otp,emile/otp,RaimoNiskanen/otp,ahmedshafeeq/otp,potatosalad/otp,RaimoNiskanen/otp,neeraj9/otp,potatosalad/otp,dumbbell/otp,potatosalad/otp,weisslj/otp,basho/otp,tuncer/otp,isvilen/otp,psyeugenic/otp,release-project/otp,massemanet/otp,uabboli/otp,g-andrade/otp,weisslj/otp,release-project/otp,potatosalad/otp,saleyn/otp,emile/otp,getong/otp,release-project/otp,RoadRunnr/otp,vladdu/otp,dgud/otp,bjorng/otp,RaimoNiskanen/otp,emacsmirror/erlang,lrascao/otp,rlipscombe/otp,vladdu/otp,matwey/otp,electricimp/otp,aboroska/otp,aboroska/otp,bernardd/otp,bjorng/otp,matwey/otp,bsmr-erlang/otp,neeraj9/otp,falkevik/otp,RaimoNiskanen/otp,uabboli/otp,bsmr-erlang/otp,rlipscombe/otp,aboroska/otp,bernardd/otp,cobusc/otp,jj1bdx/otp,lightcyphers/otp,emacsmirror/erlang,legoscia/otp,potatosalad/otp,mikpe/otp,emile/otp,emile/otp,dgud/otp,cobusc/otp,aboroska/otp,lemenkov/otp,vinoski/otp,bsmr-erlang/otp,vinoski/otp,erlang/otp,fenollp/otp,weisslj/otp,bernardd/otp,erlang/otp,falkevik/otp,jj1bdx/otp,emacsmirror/erlang,tuncer/otp,emacsmirror/erlang,mikpe/otp,emile/otp,kvakvs/otp,legoscia/otp,ferd/otp,ahmedshafeeq/otp,falkevik/otp,rlipscombe/otp