With the clear command you can delete breakpoints according to where they are in your program. With the delete command you can delete individual breakpoints, watchpoints, or catchpoints by specifying their breakpoint numbers.

It is not necessary to delete a breakpoint to proceed past it. GDB automatically ignores breakpoints on the first instruction to be executed when you continue execution without changing the execution address.

clear
Delete any breakpoints at the next instruction to be executed in the selected stack frame (see Selecting a frame). When the innermost frame is selected, this is a good way to delete a breakpoint where your program just stopped.
clearfunction
clearfilename: function
Delete any breakpoints set at entry to the function, function.
clearlinenum
clear filename: linenum
Delete any breakpoints set at or within the code of the specified line, linenum.
delete [breakpoints][bnums...]
Delete the breakpoints, watchpoints or catchpoint of the numbers specified as arguments. If no argument is specified, delete all breakpoints (GDB asks confirmation, unless you use the declaration, set confirm off). You can abbreviate this command as d.