diff --git a/src/Core/Config.php b/src/Core/Config.php
index 0dd4b2276..f64104716 100644
--- a/src/Core/Config.php
+++ b/src/Core/Config.php
@@ -19,16 +19,4 @@ use Friendica\DI;
  */
 class Config
 {
-	/**
-	 * Deletes the given key from the system configuration.
-	 *
-	 * @param string $cat The category of the configuration value
-	 * @param string $key    The configuration key to delete
-	 *
-	 * @return bool
-	 */
-	public static function delete($cat, $key)
-	{
-		return DI::config()->delete($cat, $key);
-	}
 }
diff --git a/src/Module/Admin/Features.php b/src/Module/Admin/Features.php
index 79d6e43f5..b73e35f54 100644
--- a/src/Module/Admin/Features.php
+++ b/src/Module/Admin/Features.php
@@ -34,7 +34,7 @@ class Features extends BaseAdminModule
 				if (!empty($_POST[$featurelock])) {
 					DI::config()->set('feature_lock', $feature, $val);
 				} else {
-					Config::delete('feature_lock', $feature);
+					DI::config()->delete('feature_lock', $feature);
 				}
 			}
 		}
diff --git a/src/Module/Admin/Site.php b/src/Module/Admin/Site.php
index 915eaa504..035c7c6e0 100644
--- a/src/Module/Admin/Site.php
+++ b/src/Module/Admin/Site.php
@@ -297,13 +297,13 @@ class Site extends BaseAdminModule
 		DI::config()->set('system', 'touch_icon'            , $touch_icon);
 
 		if ($banner == "") {
-			Config::delete('system', 'banner');
+			DI::config()->delete('system', 'banner');
 		} else {
 			DI::config()->set('system', 'banner', $banner);
 		}
 
 		if (empty($additional_info)) {
-			Config::delete('config', 'info');
+			DI::config()->delete('config', 'info');
 		} else {
 			DI::config()->set('config', 'info', $additional_info);
 		}
@@ -312,12 +312,12 @@ class Site extends BaseAdminModule
 		Theme::install($theme);
 
 		if ($theme_mobile == '---') {
-			Config::delete('system', 'mobile-theme');
+			DI::config()->delete('system', 'mobile-theme');
 		} else {
 			DI::config()->set('system', 'mobile-theme', $theme_mobile);
 		}
 		if ($singleuser == '---') {
-			Config::delete('system', 'singleuser');
+			DI::config()->delete('system', 'singleuser');
 		} else {
 			DI::config()->set('system', 'singleuser', $singleuser);
 		}
@@ -417,7 +417,7 @@ class Site extends BaseAdminModule
 		if (strlen(DI::config()->get('system', 'directory_submit_url')) &&
 			!strlen(DI::config()->get('system', 'directory'))) {
 			DI::config()->set('system', 'directory', dirname(DI::config()->get('system', 'directory_submit_url')));
-			Config::delete('system', 'directory_submit_url');
+			DI::config()->delete('system', 'directory_submit_url');
 		}
 
 		/* Installed themes */
diff --git a/src/Network/FKOAuthDataStore.php b/src/Network/FKOAuthDataStore.php
index 6f0a1ed83..ff6a1e216 100644
--- a/src/Network/FKOAuthDataStore.php
+++ b/src/Network/FKOAuthDataStore.php
@@ -177,7 +177,7 @@ class FKOAuthDataStore extends OAuthDataStore
 		DBA::delete('tokens', ['id' => $token->key]);
 
 		if (!is_null($ret) && !is_null($uverifier)) {
-			Config::delete("oauth", $verifier);
+			DI::config()->delete("oauth", $verifier);
 		}
 
 		return $ret;
diff --git a/update.php b/update.php
index a40d19785..a038edf21 100644
--- a/update.php
+++ b/update.php
@@ -89,7 +89,7 @@ function update_1189()
 	if (strlen(DI::config()->get('system', 'directory_submit_url')) &&
 		!strlen(DI::config()->get('system', 'directory'))) {
 		DI::config()->set('system', 'directory', dirname(DI::config()->get('system', 'directory_submit_url')));
-		Config::delete('system', 'directory_submit_url');
+		DI::config()->delete('system', 'directory_submit_url');
 	}
 
 	return Update::SUCCESS;
@@ -420,7 +420,7 @@ function update_1330()
 		}
 
 		// try to delete the class since it isn't needed. This won't work with config files
-		Config::delete('storage', 'class');
+		DI::config()->delete('storage', 'class');
 	}
 
 	// Update attachments and photos