delbpt — delete breakpoints
delbpt([macroname [,linenumb]])
Deletes the breakpoint at line linenumb in the function
macroname.
linenumb can be a line or column vector of line numbers,
or a single scalar line number.
If linenumb is omitted, all the breakpoints in function
macroname are deleted.
If both macroname and linenumb are omitted,
all the breakpoints in all the functions are deleted.