Revert fixes to documentation generation in CI. (#15)

Author: jonathanknowles

.github/workflows/build.yml

@@ -74,15 +74,13 @@ jobs:
           cabal build all
           --builddir=${{ env.cabal-build-dir }}
           --only-dependencies
-          --enable-documentation
 
       - name: Build
         run: >
           cabal build all
           --builddir=${{ env.cabal-build-dir }}
           --enable-tests
           --enable-benchmarks
-          --enable-documentation
 
       - name: Test
         run: >