Revert "Added Rotating log handler from Ye Yan"
Revert "Added Rotating log handler from Ye Yan"

This reverts commit 34e31c3e128819a059491734e8c1dfd86c25af08.

didn't add dep on FilePath to cabal

also:

src/System/Log/Handler/Rotating.hs:76:0:
    Illegal instance declaration for `Sizeable [Char]'
        (All instance types must be of the form (T a1 ... an)
         where a1 ... an are type *variables*,
         and each type variable appears at most once in the instance head.
         Use -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `Sizeable [Char]'

jgoerzen/hslogger