build: remove dmg dependencies

contrib/guix/manifest.scm

@@ -3,7 +3,6 @@
              ((gnu packages bash) #:select (bash-minimal))
              (gnu packages bison)
              ((gnu packages certs) #:select (nss-certs))
-             ((gnu packages cdrom) #:select (xorriso))
              ((gnu packages cmake) #:select (cmake-minimal))
              (gnu packages commencement)
              (gnu packages compression)
@@ -606,5 +605,5 @@ inspecting signatures in Mach-O binaries.")
           ((string-contains target "-linux-")
            (list (make-bitcoin-cross-toolchain target)))
           ((string-contains target "darwin")
-           (list clang-toolchain-15 binutils cmake-minimal xorriso python-signapple zip))
+           (list clang-toolchain-15 binutils cmake-minimal python-signapple zip))
           (else '())))))