diff --git a/lib/private/legacy/json.php b/lib/private/legacy/json.php
index 0afa179b3d8ec..b02e5c879fcae 100644
--- a/lib/private/legacy/json.php
+++ b/lib/private/legacy/json.php
@@ -111,21 +111,6 @@ public static function checkAdminUser() {
 		}
 	}
 
-	/**
-	 * Check is a given user exists - send json error msg if not
-	 * @param string $user
-	 * @deprecated Use a AppFramework JSONResponse instead
-	 * @suppress PhanDeprecatedFunction
-	 */
-	public static function checkUserExists($user) {
-		if (!\OC::$server->getUserManager()->userExists($user)) {
-			$l = \OC::$server->getL10N('lib');
-			OCP\JSON::error(array('data' => array('message' => $l->t('Unknown user'), 'error' => 'unknown_user' )));
-			exit;
-		}
-	}
-
-
 	/**
 	 * Check if the user is a subadmin, send json error msg if not
 	 * @deprecated Use annotation based ACLs from the AppFramework instead
diff --git a/lib/public/JSON.php b/lib/public/JSON.php
index c56c3b645a9ef..151a590b294b7 100644
--- a/lib/public/JSON.php
+++ b/lib/public/JSON.php
@@ -41,18 +41,6 @@
  * @deprecated 8.1.0 Use a AppFramework JSONResponse instead
  */
 class JSON {
-	/**
-	 * Encode and print $data in JSON format
-	 * @param array $data The data to use
-	 * @param bool $setContentType the optional content type
-	 * @deprecated 8.1.0 Use a AppFramework JSONResponse instead
-	 *
-	 * @suppress PhanDeprecatedFunction
-	 */
-	public static function encodedPrint( $data, $setContentType=true ) {
-		\OC_JSON::encodedPrint($data, $setContentType);
-	}
-
 	/**
 	 * Check if the user is logged in, send json error msg if not.
 	 *
@@ -135,16 +123,6 @@ public static function error( $data = array() ) {
 		\OC_JSON::error($data);
 	}
 
-	/**
-	 * Set Content-Type header to jsonrequest
-	 * @param string $type The content type header
-	 * @deprecated 8.1.0 Use a AppFramework JSONResponse instead
-	 * @suppress PhanDeprecatedFunction
-	 */
-	public static function setContentTypeHeader( $type='application/json' ) {
-		\OC_JSON::setContentTypeHeader($type);
-	}
-
 	/**
 	 * Check if the App is enabled and send JSON error message instead
 	 *
@@ -196,14 +174,4 @@ public static function checkAdminUser() {
 	public static function encode($data) {
 		return \OC_JSON::encode($data);
 	}
-
-	/**
-	 * Check is a given user exists - send json error msg if not
-	 * @param string $user
-	 * @deprecated 8.1.0 Use a AppFramework JSONResponse instead
-	 * @suppress PhanDeprecatedFunction
-	 */
-	public static function checkUserExists($user) {
-		\OC_JSON::checkUserExists($user);
-	}
 }