Drop perl-Digest-MD4

Unused and never had any users in MSYS2.

perl-Digest-MD4/PKGBUILD

@@ -1,35 +0,0 @@
-# Maintainer: Alexey Pavlov <alexpux@gmail.com>
-
-_realname=Digest-MD4
-pkgname=perl-${_realname}
-pkgver=1.9
-pkgrel=9
-pkgdesc="Perl Module: Perl interface to the MD4 Algorithm."
-arch=('i686' 'x86_64')
-license=('PerlArtistic')
-url="https://metacpan.org/dist/Digest-MD4"
-groups=('perl-modules')
-makedepends=('perl-devel' 'gcc' 'make')
-depends=('perl>=5.10.0') # 'perl-Digest-SHA1' in perl core now
-options=(!emptydirs)
-replaces=('Digest-MD4')
-provides=('Digest-MD4')
-source=(https://www.cpan.org/authors/id/M/MI/MIKEM/DigestMD4/${_realname}-${pkgver}.tar.gz)
-sha256sums=('665110bba32470f398f311cd6462fd8975d7c83675ff674bc2f6c7b72b0caaa6')
-
-build() {
-  cd ${srcdir}/${_realname}-${pkgver}
-  # install module in vendor directories.
-  PERL_MM_USE_DEFAULT=1 perl Makefile.PL INSTALLDIRS=vendor
-  make
-}
-
-check() {
-  cd ${srcdir}/${_realname}-${pkgver}
-  make test
-}
-
-package() {
-  cd ${srcdir}/${_realname}-${pkgver}
-  make install DESTDIR=${pkgdir}
-}