How do I remove lines from GRUB that no longer work?

[Von Kirkus]

After getting Linux 5.0 to update successfully my GRUB menu looks like this, but only the first 2 lines and last 2 lines run the machine.
I don't want to break my system while I am trying to learn Linux. I still need Windows to run some of my applications, but my older laptop certainly runs Linux much faster and works great for the virtual classes I'm doing right now. Any help would be greatly appreciated.

*Ubuntu                                                        When selected boots into Linux 5.0 updated normally
  Advanced options for Ubuntu                          Opens options normally
  Windows Boot Manager (on /dev/sda1)            Tries to boot Windows, but ends at blue Windows error boot recovery options screen
  Linux Lite 4.8 (18.04) (on /dev/sda4)              Goes to logon screen, but won't open, just keeps returning to logon screen after P/W
  Advanced options for Linux Lite 4.8 (18.04) (on /dev/sda4)    Same as above on all options
  Linux Lite 5.0 (20.04) (on /dev/sda7)              Goes to logon screen, but won't open, just keeps returning to logon screen after P/W
  Advanced options for Linux Lite 5.0 (20.04) (on /dev/sda7)    Same as above on all options
  Windows Boot Manager  (on  /dev/sbd1)            Boots Windows normally
  UEFI Firmware Settings                                    Opens BIOS settings normally