diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 02a53a8..25dacde 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,5 +1,6 @@
 Metatag 7.x-1.x-dev, xxxx-xx-xx
 -------------------------------
+#1978708 by scor: Revert: Add a README.txt note about OG validation problems from core RDF module
 #2362639 by DamienMcKenna: Improved defaults for Google+ meta tags.
 #2318985 by DamienMcKenna: Indicate that Open Graph tags are used on Pinterest.
 #2362639 by DamienMcKenna: Added itemtype default values for Google+ meta tags.
diff --git a/README.txt b/README.txt
index 8fd81ca..2bf769e 100644
--- a/README.txt
+++ b/README.txt
@@ -221,10 +221,6 @@ Troubleshooting / Known Issues
     <title>"The page title | My cool site"</title>
   The solution is to remove the browser plugin - the page's actual output is not
   affected, it is just a problem in the browser.
-* The core RDF module is known to cause validation problems for Open Graph meta
-  tags output by the Metatag:OpenGraph module. Unless it is actually needed for
-  the site, it may be worthwhile to disable the RDF module to avoid any
-  possible problems for the Open Graph integration.
 * If the Administration Language (admin_language) module is installed, it is
   recommended to disable the "Force language neutral aliases" setting on the
   Admin Language settings page, i.e. set the "admin_language_force_neutral"
diff --git a/metatag_opengraph/metatag_opengraph.install b/metatag_opengraph/metatag_opengraph.install
index 1d3813e..4987ebf 100644
--- a/metatag_opengraph/metatag_opengraph.install
+++ b/metatag_opengraph/metatag_opengraph.install
@@ -5,38 +5,6 @@
  */
 
 /**
- * Implements hook_requirements().
- */
-function metatag_opengraph_requirements($phase) {
-  $requirements = array();
-  // Ensure translations don't break during installation.
-  $t = get_t();
-
-  if ($phase == 'runtime') {
-    if (module_exists('rdf')) {
-      $requirements['metatag_og_rdf'] = array(
-        'severity' => REQUIREMENT_WARNING,
-        'title' => 'Metatag:OpenGraph',
-        'value' => $t('Possible conflict with the RDF module'),
-        'description' => $t("The core RDF module is known to cause validation problems for Open Graph meta tags. Unless it is actually needed for the site, it may be worthwhile to disable the RDF module to avoid any possible problems for the Open Graph integration."),
-      );
-    }
-  }
-
-  return $requirements;
-}
-
-/**
- * Implements hook_install().
- */
-function metatag_opengraph_install() {
-  // Display a warning about possible conflicts with the RDF module.
-  if (module_exists('rdf')) {
-    drupal_set_message(t('The core RDF module is known to cause validation problems for Open Graph meta tags. Unless it is actually needed for the site, it may be worthwhile to disable the RDF module to avoid any possible problems for the Open Graph integration.'));
-  }
-}
-
-/**
  * Implementations of hook_update_N().
  */