Drop apt::cron::download, and turn $apt_cron_hours into a class parameter for apt::cron::dist_upgrade.

I've introduced apt::cron::download, am not using it anymore, and have
never seen anyone else submit a bug or a merge request for it. Thus,
I feel pretty confident in dropping it.

And this allows me to trivially get rid of the $apt_cron_hours global
variable noticed by LeLutin in #13.

README.md

@@ -49,6 +49,9 @@ Ubuntu support is lagging behind but not absent either.
 
 ## Upgrade Notice<a name="upgrade-notice"></a>
 
+ * The `$apt_cron_hours` global variable is deprecated.
+   Use `apt::cron::dist_upgrade`'s `cron_hours` parameter instead.
+
  * The default value of the `$repos` parameter was removed since the logic is
    now in the `apt::params` class. If you have explicitly set `$repos` to
    'auto' in your manifests, you should remove this.

manifests/cron/base.pp

@@ -1,20 +0,0 @@
-class apt::cron::base {
-
-  package { 'cron-apt': ensure => installed }
-
-  case $apt_cron_hours {
-    '': {}
-    default: {
-      # cron-apt defaults to run every night at 4 o'clock
-      # so we try not to run at the same time.
-      cron { 'apt_cron_every_N_hours':
-        command => 'test -x /usr/sbin/cron-apt && /usr/sbin/cron-apt',
-        user    => root,
-        hour    => "${apt_cron_hours}",
-        minute  => 10,
-        require => Package['cron-apt'],
-      }
-    }
-  }
-
-}

manifests/cron/dist_upgrade.pp

@@ -1,4 +1,23 @@
-class apt::cron::dist_upgrade inherits apt::cron::base {
+class apt::cron::dist_upgrade (
+  $cron_hours = '',
+) {
+
+  package { 'cron-apt': ensure => installed }
+
+  case $cron_hours {
+    '': {}
+    default: {
+      # cron-apt defaults to run every night at 4 o'clock
+      # so we try not to run at the same time.
+      cron { 'apt_cron_every_N_hours':
+        command => 'test -x /usr/sbin/cron-apt && /usr/sbin/cron-apt',
+        user    => root,
+        hour    => "${cron_hours}",
+        minute  => 10,
+        require => Package['cron-apt'],
+      }
+    }
+  }
 
   $action = "autoclean -y
 dist-upgrade -y -o APT::Get::Show-Upgraded=true -o 'DPkg::Options::=--force-confold'

manifests/cron/download.pp

@@ -1,27 +0,0 @@
-class apt::cron::download inherits apt::cron::base {
-
-  $action = "autoclean -y
-dist-upgrade -d -y -o APT::Get::Show-Upgraded=true
-"
-
-  file { '/etc/cron-apt/action.d/4-dist-upgrade':
-    ensure => absent,
-  }
-
-  file { '/etc/cron-apt/action.d/3-download':
-    content => $action,
-    require => Package[cron-apt],
-    owner   => root,
-    group   => 0,
-    mode    => '0644';
-  }
-
-  file { '/etc/cron-apt/config.d/MAILON':
-    content => "MAILON=changes\n",
-    require => Package[cron-apt],
-    owner   => root,
-    group   => 0,
-    mode    => '0644';
-  }
-
-}