adapt to haskell-CI/haskell-ci#790

Author: ulysses4ever

.github/workflows/haskell-ci.yml

@@ -214,8 +214,6 @@ jobs:
           echo "    ghc-options: -Werror=missing-methods -Werror=missing-fields" >> cabal.project
           if [ $((HCNUMVER >= 90400)) -ne 0 ] ; then echo "package rere" >> cabal.project ; fi
           if [ $((HCNUMVER >= 90400)) -ne 0 ] ; then echo "    ghc-options: -Werror=unused-packages" >> cabal.project ; fi
-          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then echo "package rere" >> cabal.project ; fi
-          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then echo "    ghc-options: -Werror=incomplete-patterns -Werror=incomplete-uni-patterns" >> cabal.project ; fi
           cat >> cabal.project <<EOF
           constraints: rere +rere-intersection
           EOF

cabal.haskell-ci

@@ -1,3 +1,4 @@
+error-incomplete-patterns: False
 branches:   master
 tests:      >=8.4
 benchmarks: >=8.4