[#2207] Removed null check after new

STACK Output:
bug: anti-dce
model: |
  %tobool = icmp ne %class.tcp_network_plugin* %7, null, !dbg !1365
  -->  true
  ************************************************************
  if.then:
  call void (i32, i8*, ...)* @rodsLog(i32 3, i8* getelementptr inbounds ([52 x i8]* @.str38, i32 0, i32 0)), !dbg !1367
  br label %return, !dbg !1369
stack:
  - /home/kellerb/software/root-stack/irods/plugins/network/tcp/libtcp.cpp:689:0
ncore: 1
core:
  - /home/kellerb/software/root-stack/irods/plugins/network/tcp/libtcp.cpp:668:0
    - null pointer dereference