[#2207] Removed unnecessary null check

STACK Output:
bug: anti-dce
model: |
  %tobool = icmp ne %class.ssl_network_plugin* %7, null, !dbg !4482
  -->  true
  ************************************************************
  if.then:
  %call1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([52 x i8]* @.str67, i32 0, i32 0)), !dbg !4484
  br label %return, !dbg !4486
stack:
  - /home/kellerb/software/root-stack/irods/plugins/network/ssl/libssl.cpp:1281:0
ncore: 1
core:
  - /home/kellerb/software/root-stack/irods/plugins/network/ssl/libssl.cpp:1260:0
    - null pointer dereference