diff --git a/apps/files_external/lib/config.php b/apps/files_external/lib/config.php
index 13960dde68..ae04daf4f3 100644
--- a/apps/files_external/lib/config.php
+++ b/apps/files_external/lib/config.php
@@ -361,7 +361,7 @@ class OC_Mount_Config {
 	 */
 	private static function encryptPassword($password) {
 		$cipher = self::getCipher();
-		$iv = \OCP\Util::generateRandomBytes(16);
+		$iv = \OC::$server->getSecureRandom()->generate(16);
 		$cipher->setIV($iv);
 		return base64_encode($iv . $cipher->encrypt($password));
 	}
diff --git a/apps/user_ldap/tests/Group_LDAPTest.php b/apps/user_ldap/tests/Group_LDAPTest.php
index e758bc9bd0..03fd73f261 100644
--- a/apps/user_ldap/tests/Group_LDAPTest.php
+++ b/apps/user_ldap/tests/Group_LDAPTest.php
@@ -150,7 +150,7 @@ class Group_LDAPTest extends \Test\TestCase {
 		$access->expects($this->any())
 			->method('dn2username')
 			->will($this->returnCallback(function() {
-				return 'foobar' . \OCP\Util::generateRandomBytes(7);
+				return 'foobar' . \OC::$server->getSecureRandom()->generate(7);
 			}));
 
 		$groupBackend = new GroupLDAP($access,$pluginManager);
diff --git a/lib/public/Util.php b/lib/public/Util.php
index 5127beaf50..2fb6bdf491 100644
--- a/lib/public/Util.php
+++ b/lib/public/Util.php
@@ -244,21 +244,6 @@ class Util {
 		\OC_Util::addHeader($tag, $attributes, $text);
 	}
 
-	/**
-	 * formats a timestamp in the "right" way
-	 * @param int $timestamp $timestamp
-	 * @param bool $dateOnly option to omit time from the result
-	 * @param DateTimeZone|string $timeZone where the given timestamp shall be converted to
-	 * @return string timestamp
-	 *
-	 * @deprecated 8.0.0 Use \OC::$server->query('DateTimeFormatter') instead
-	 * @since 4.0.0
-	 * @suppress PhanDeprecatedFunction
-	 */
-	public static function formatDate($timestamp, $dateOnly=false, $timeZone = null) {
-		return \OC_Util::formatDate($timestamp, $dateOnly, $timeZone);
-	}
-
 	/**
 	 * check if some encrypted files are stored
 	 * @return bool
@@ -656,17 +641,6 @@ class Util {
 		return \OC_Util::isValidFileName($file);
 	}
 
-	/**
-	 * Generates a cryptographic secure pseudo-random string
-	 * @param int $length of the random string
-	 * @return string
-	 * @deprecated 8.0.0 Use \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate($length); instead
-	 * @since 7.0.0
-	 */
-	public static function generateRandomBytes($length = 30) {
-		return \OC::$server->getSecureRandom()->generate($length, \OCP\Security\ISecureRandom::CHAR_LOWER.\OCP\Security\ISecureRandom::CHAR_DIGITS);
-	}
-
 	/**
 	 * Compare two strings to provide a natural sort
 	 * @param string $a first string to compare