Remove Travis flags

Author: paf31

travis/build.sh

@@ -28,9 +28,6 @@ if [ -z "$TRAVIS_TAG" ]
 then
   # On non-release builds, disable optimizations.
   STACK_EXTRA_FLAGS="--fast"
-else
-  # On release builds, set the 'release' cabal flag.
-  STACK_EXTRA_FLAGS="--flag purescript:RELEASE"
 fi
 
 if [ "$STACKAGE_NIGHTLY" = "true" ]