remove implication panties_under_buruma -> panties
a lot of times the images with panties_under_buruma show pantylines, with no panties actually visible.
Ex: post #3364505, post #3334062, post #3146739, etc.
The definition also hints to the tag being used for pantylines more than visible panties but, in some cases panties are also visible, so, we shouldn't imply pantylines instead.
EDIT: The bulk update request #1913 (forum #153539) has been approved by @Hillside_Moose.
Updated by DanbooruBot