[aur-general] Obsolete grub2-gfxmenu packages

[Final Crisis]

The following aur packages I made some time ago have been obsolete and the 
source files non-existent for a very long time and should be removed:
grub2-theme-aftermathblue, grub2-theme-archsphere, grub2-theme-distroballs, 
grub2-theme-elegantarch, grub2-theme-planeplant, grub2-theme-simplyblack, 
grub2-theme-ubuntuglow, grub2-gfxmenu-overlay, grub2-icons-circlestarts
Thanks.