Do you know how you managed this? You should be able to remove it with console commands like /c game.player.remove_item({name="cube-ultradense-utility-cube", count=1}) or /c game.player.remove_item({name="cube-phantom-ultradense-constituent", count=1}).
Speedy Control
Simulation Helper
Show Max Underground Distance
Remote Configuration
Krastorio 2 Assets
Inland Pumps
Helmod: Assistant for planning your factory
base mod
AAI Loaders
Corpse Marker
Bob's Adjustable Inserters
Factorio Library
Faster Roboport Charging
Merging Chests
Lighted Electric Poles +
Resource Map Markers
The Blueprint Designer Lab
Ultracube: Age of Cube
Helmod: Assistant for planning your factory