cabal: allow building under MacPorts again

The recently released haskell tar-0.6 introduces some breaking changes
that prevent Cabal from building on MacPorts because of its previous use
of `--allow-newer` in `build.target`. This line was deliberately added
(haskell/cabal#8360 (comment)),
but it's causes persistent build failure.

lang/cabal/Portfile

@@ -4,7 +4,7 @@ PortSystem          1.0
 
 name                cabal
 version             3.10.2.0
-revision            0
+revision            1
 categories          lang haskell devel
 platforms           darwin
 license             BSD
@@ -152,10 +152,8 @@ if {[exists extract.rename]} {
                     "CABAL_CONFIG=${haskell_cabal.cabal_root}/config" \
                     "GHC=${prefix}/bin/ghc"
 
-    # https://github.com/haskell/cabal/issues/8360#issuecomment-1220918581
     build.target    ${name}-install \
-                    --project-file=cabal.project.release \
-                    --allow-newer
+                    --project-file=cabal.project.release
     build.post_args-append \
                     --bindir=${prefix}/bin \
                     --datadir=${prefix}/share/${subport}