build: don't compress macOS DMG

contrib/guix/libexec/build.sh

@@ -79,19 +79,6 @@ prepend_to_search_env_var() {
     export "${1}=${2}${!1:+:}${!1}"
 }
 
-case "$HOST" in
-    *darwin*)
-        # When targeting darwin, zlib is required by native_libdmg-hfsplus.
-        zlib_store_path=$(store_path "zlib")
-        zlib_static_store_path=$(store_path "zlib" static)
-
-        prepend_to_search_env_var LIBRARY_PATH "${zlib_static_store_path}/lib:${zlib_store_path}/lib"
-        prepend_to_search_env_var C_INCLUDE_PATH "${zlib_store_path}/include"
-        prepend_to_search_env_var CPLUS_INCLUDE_PATH "${zlib_store_path}/include"
-        prepend_to_search_env_var OBJC_INCLUDE_PATH "${zlib_store_path}/include"
-        prepend_to_search_env_var OBJCPLUS_INCLUDE_PATH "${zlib_store_path}/include"
-esac
-
 # Set environment variables to point the CROSS toolchain to the right
 # includes/libs for $HOST
 case "$HOST" in
@@ -332,8 +319,7 @@ mkdir -p "$DISTSRC"
             mkdir -p "unsigned-app-${HOST}"
             cp  --target-directory="unsigned-app-${HOST}" \
                 osx_volname \
-                contrib/macdeploy/detached-sig-create.sh \
-                "${BASEPREFIX}/${HOST}"/native/bin/dmg
+                contrib/macdeploy/detached-sig-create.sh
             mv --target-directory="unsigned-app-${HOST}" dist
             (
                 cd "unsigned-app-${HOST}"