[snmp|agent] Dialyzer cleanup
[snmp|agent] Dialyzer cleanup

According to dialyzer a couple of clauses could be removed...

OTP-16360

vladdu/otp,dumbbell/otp,getong/otp,getong/otp,emacsmirror/erlang,g-andrade/otp,lrascao/otp,kvakvs/otp,bjorng/otp,dumbbell/otp,ferd/otp,getong/otp,erlang/otp,erlang/otp,dgud/otp,isvilen/otp,getong/otp,rlipscombe/otp,getong/otp,lrascao/otp,dumbbell/otp,getong/otp,emacsmirror/erlang,vladdu/otp,jj1bdx/otp,vinoski/otp,electricimp/otp,rlipscombe/otp,mikpe/otp,erlang/otp,emacsmirror/erlang,kvakvs/otp,bjorng/otp,emacsmirror/erlang,uabboli/otp,jj1bdx/otp,ferd/otp,electricimp/otp,isvilen/otp,uabboli/otp,g-andrade/otp,isvilen/otp,ferd/otp,erlang/otp,potatosalad/otp,dgud/otp,getong/otp,ferd/otp,kvakvs/otp,dumbbell/otp,bjorng/otp,bjorng/otp,lrascao/otp,potatosalad/otp,bjorng/otp,vladdu/otp,vladdu/otp,g-andrade/otp,potatosalad/otp,mikpe/otp,rlipscombe/otp,potatosalad/otp,electricimp/otp,uabboli/otp,rlipscombe/otp,jj1bdx/otp,lrascao/otp,jj1bdx/otp,jj1bdx/otp,g-andrade/otp,dumbbell/otp,uabboli/otp,erlang/otp,dumbbell/otp,dumbbell/otp,potatosalad/otp,mikpe/otp,electricimp/otp,uabboli/otp,dgud/otp,lrascao/otp,emacsmirror/erlang,g-andrade/otp,kvakvs/otp,emacsmirror/erlang,isvilen/otp,ferd/otp,electricimp/otp,vinoski/otp,getong/otp,kvakvs/otp,emacsmirror/erlang,electricimp/otp,g-andrade/otp,jj1bdx/otp,isvilen/otp,rlipscombe/otp,g-andrade/otp,isvilen/otp,vladdu/otp,vinoski/otp,rlipscombe/otp,ferd/otp,rlipscombe/otp,vinoski/otp,erlang/otp,kvakvs/otp,vladdu/otp,lrascao/otp,electricimp/otp,erlang/otp,bjorng/otp,emacsmirror/erlang,rlipscombe/otp,dgud/otp,rlipscombe/otp,dumbbell/otp,getong/otp,dgud/otp,uabboli/otp,mikpe/otp,getong/otp,isvilen/otp,g-andrade/otp,g-andrade/otp,jj1bdx/otp,isvilen/otp,potatosalad/otp,uabboli/otp,dgud/otp,vinoski/otp,isvilen/otp,vinoski/otp,mikpe/otp,lrascao/otp,uabboli/otp,mikpe/otp,bjorng/otp,vinoski/otp,ferd/otp,lrascao/otp,electricimp/otp,vinoski/otp,jj1bdx/otp,g-andrade/otp,jj1bdx/otp,lrascao/otp,mikpe/otp,uabboli/otp,potatosalad/otp,ferd/otp,emacsmirror/erlang,potatosalad/otp,dgud/otp,isvilen/otp,kvakvs/otp,vinoski/otp,potatosalad/otp,electricimp/otp,bjorng/otp,potatosalad/otp,dgud/otp,erlang/otp,mikpe/otp,kvakvs/otp,kvakvs/otp,bjorng/otp,dumbbell/otp,mikpe/otp,rlipscombe/otp,bjorng/otp,erlang/otp,mikpe/otp,vinoski/otp,vladdu/otp,emacsmirror/erlang,dgud/otp,vladdu/otp,vladdu/otp,erlang/otp,dumbbell/otp,dgud/otp,jj1bdx/otp,ferd/otp