Give me a few moments and I'll let you know what happens. Thanks for looking into this (even though you are by no means required to do so).
EDIT: The link you posted isn't working. It takes me to a Google Documents page and says page or document I'm requesting is not available.
I did manage to get rid of it (sorta) in the notification pull-down menu. I just went into Liquid Tweaks where it allows us to change colors and chaned the color referring to carrier to be completely transparent. The lockscreen issue still exists, though.