Removed static types for compatibility

Author: DavidLambauer

app/code/Magento/AdminNotification/Block/Grid/Renderer/Actions.php

@@ -45,7 +45,7 @@ public function __construct(Context $context, Data $urlHelper, array $data = [])
      * @param   \Magento\Framework\DataObject $row
      * @return  string
      */
-    public function render(DataObject $row) : string
+    public function render(DataObject $row)
     {
         $readDetailsHtml = $row->getData('url') ? '<a class="action-details" target="_blank" href="' .
             $this->escapeUrl($row->getData('url'))

app/code/Magento/AdminNotification/Block/Grid/Renderer/Notice.php

@@ -25,7 +25,7 @@ class Notice extends AbstractRenderer
      * @param   \Magento\Framework\DataObject $row
      * @return  string
      */
-    public function render(DataObject $row) : string
+    public function render(DataObject $row)
     {
         return '<span class="grid-row-title">' .
             $this->escapeHtml($row->getData('title')) .

app/code/Magento/AdminNotification/Block/Grid/Renderer/Severity.php

@@ -44,7 +44,7 @@ public function __construct(Context $context, Inbox $notice, array $data = [])
      * @param   \Magento\Framework\DataObject $row
      * @return  string
      */
-    public function render(DataObject $row) : string
+    public function render(DataObject $row)
     {
         $class = '';
         $value = '';