Remove AGS deletion from quickshell.sh installation script.
Both AGS and Quickshell can now be installed simultaneously.
The Hyprland-Dots OverviewToggle.sh script (SUPER+A) handles
automatic fallback between Quickshell and AGS, trying Quickshell
first and falling back to AGS if needed.
This resolves issues where users had to choose between the two
tools, even when both might be needed for redundancy during
periods of instability in either project.