What the title says. Seems the developers grew annoyed with this too and added that check in BFME2 and ROTWK. Doesn't work in BFME1.
Just create an empty text file called
in the game's base directory and it won't ask for confirmation anymore.
Be sure the file is actually called worldbuilder_noeula.txt and not worldbuilder_noeula.txt.txt because you have extensions disabled by Windows default.