appstream: avoid the custom gtk-doc symlink

otherwise that ends up in the tarball

mingw-w64-appstream/PKGBUILD

@@ -4,7 +4,7 @@ _realname=appstream
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=0.16.1.r163.geebb0f8c
-pkgrel=1
+pkgrel=2
 pkgdesc="appstream"
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clang32' 'clangarm64')
@@ -70,5 +70,8 @@ package() {
 
   DESTDIR="${pkgdir}" meson install
 
+  # remove html docs symlink
+  rm -Rf "${pkgdir}${MINGW_PREFIX}/share/gtk-doc"
+
   install -Dm644 "${srcdir}/${_realname}/COPYING" "${pkgdir}${MINGW_PREFIX}/share/licenses/${_realname}/COPYING"
 }