You cannot completely delete Apple's core Split View or window tiling code from macOS, but you can stop windows from accidentally snapping or splitting by turning off edge-dragging and tile features in your System Settings
Turn Off Automatic Window Tiling (macOS Sequoia and Later)
If windows snap into a split screen when you drag them near the edges, disable the drag-to-tile feature:
- Open the Apple menu () in the top-left corner.
- Select System Settings.
- Click Desktop & Dock in the sidebar.
- Scroll down to the Windows section.
- Toggle off "Drag windows to left or right edge of screen to tile".
- Toggle off "Drag windows to menu bar to fill screen".
- (Optional) Turn on "Hold ⌥ key while dragging windows to tile" so it only happens if you deliberately hold the Option key.