You have deleted a lot of things you need in the compiler. At least you deleted the strip command. To return the strip to normal operation, you need to return Editor.u, Fire.u. Editor.u is needed for the command, Fire.u for the Editor.u build. You also need to add them to UT2003.ini, example below:
If you want to protect your code at least a little, use this command to build your interface.u, or any other unrealscript file you need.
To compile with the strip command, use the Make_Interface_Strip.bat file
Source Editor, Fire and Make_Interface_Strip.bat: Download
After the first build of Editor.u and Fire.u, you can delete the source code folders if they bother you, they are no longer needed for further work.
I use this command myself, though in a different compiler. I decided to share the fix because I was helping a friend with restoring this feature, as I was surprised that it didn't work for him. For this reason, that it uses a similar compiler, I decided to share the fix here.