gtkTextBufferDeleteMark: gtkTextBufferDeleteMark
Description
Deletes mark, so that it's no longer located anywhere in the
buffer. Removes the reference the buffer holds to the mark, it will be freed. Even
if the mark isn't freed, most operations on mark become
invalid, until it gets added to a buffer again with 
gtkTextBufferAddMark. Use gtkTextMarkGetDeleted to  
find out if a mark has been removed from its buffer.
The "mark-deleted" signal will be emitted as notification after 
the mark is deleted.Usage
gtkTextBufferDeleteMark(object, mark)