Removed unused lastFlushTime
Removed unused lastFlushTime

This field was being assigned, but never actually read.

shana/Akavache,kmjonmastro/Akavache,PureWeen/Akavache,akavache/Akavache,shana/Akavache,ghuntley/AkavacheSandpit,mms-/Akavache,gimsum/Akavache,shiftkey/Akavache,martijn00/Akavache,Loke155/Akavache,jcomtois/Akavache,MarcMagnin/Akavache,MathieuDSTP/MyAkavache,christer155/Akavache,bbqchickenrobot/Akavache