haskell.compiler.ghc924Binary: remove unnecessary hadrian workaround

The fix for the issue we are working around has been released in 9.2.3
already, so we no longer need to apply it manually:

302eb4c218

pkgs/development/compilers/ghc/9.2.4-binary.nix

@@ -263,20 +263,6 @@ stdenv.mkDerivation rec {
     lib.optionalString stdenv.isLinux ''
       find . -type f -executable -exec patchelf \
           --interpreter ${stdenv.cc.bintools.dynamicLinker} {} \;
-    '' +
-    # The hadrian install Makefile uses 'xxx' as a temporary placeholder in path
-    # substitution. Which can break the build if the store path / prefix happens
-    # to contain this string. This will be fixed with 9.2.3 bindists.
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/21402
-    ''
-      # Detect hadrian Makefile by checking for the target that has the problem
-      if grep '^update_package_db' ghc-${version}*/Makefile > /dev/null; then
-        echo Hadrian bindist, applying workaround for xxx path substitution.
-        # based on https://gitlab.haskell.org/ghc/ghc/-/commit/dd5fecb0e2990b192d92f4dfd7519ecb33164fad.patch
-        substituteInPlace ghc-${version}*/Makefile --replace 'xxx' '\0xxx\0'
-      else
-        echo Not a hadrian bindist, not applying xxx path workaround.
-      fi
     '';
 
   # fix for `configure: error: Your linker is affected by binutils #16177`