makefile: remove unused FLAGS variable.
-rw-r--r-- 46 Setup.hs
drwxr-xr-x - data
drwxr-xr-x - doc
-rw-r--r-- 1245 makefile
-rw-r--r-- 4086 spline3.cabal
drwxr-xr-x - src
drwxr-xr-x - test
drwxr-xr-x - util