Yes, you can delete them.
They Got there by checking the Option to Compile with Bebug info in the script compiler.
You will want to select the options in the script editor and turn off the option, if you do not want them to show up again.
They are only used by the SpawnScriptDebuger() function. They contain the lables that you used for your varaiables. Something that just is not in a Compiled script.