chore: Clean up comment in NetworkOps_test.cpp (#6066)

This change removes a copyright notice that was accidentally copied over from another file.

Author: a1q123456

.github/scripts/rename/copyright.sh

@@ -70,9 +70,6 @@ fi
 if ! grep -q 'Dev Null' src/test/app/tx/apply_test.cpp; then
   echo -e "// Copyright (c) 2020 Dev Null Productions\n\n$(cat src/test/app/tx/apply_test.cpp)" > src/test/app/tx/apply_test.cpp
 fi
-if ! grep -q 'Dev Null' src/test/app/NetworkOPs_test.cpp; then
-  echo -e "// Copyright (c) 2020 Dev Null Productions\n\n$(cat src/test/app/NetworkOPs_test.cpp)" > src/test/app/NetworkOPs_test.cpp
-fi
 if ! grep -q 'Dev Null' src/test/rpc/ManifestRPC_test.cpp; then
   echo -e "// Copyright (c) 2020 Dev Null Productions\n\n$(cat src/test/rpc/ManifestRPC_test.cpp)" > src/test/rpc/ManifestRPC_test.cpp
 fi

src/test/app/NetworkOPs_test.cpp

@@ -1,5 +1,3 @@
-// Copyright (c) 2020 Dev Null Productions
-
 #include <test/jtx.h>
 #include <test/jtx/CaptureLogs.h>
 #include <test/jtx/Env.h>