Remove deprecated hook_civicrm_tabs

This hook has been deprecated for 5 years. Time to remove it.

CRM/Contact/Page/View/Summary.php

@@ -425,9 +425,8 @@ public function getTabs() {
       $weight += 10;
     }
 
+    // Allow other modules to add or remove tabs
     $context = ['contact_id' => $this->_contactId];
-    // see if any other modules want to add any tabs
-    CRM_Utils_Hook::tabs($allTabs, $this->_contactId);
     CRM_Utils_Hook::tabset('civicrm/contact/view', $allTabs, $context);
 
     // now sort the tabs based on weight

CRM/Utils/Hook.php

@@ -825,23 +825,6 @@ public static function buildStateProvinceForCountry($countryID, &$states) {
     );
   }
 
-  /**
-   * This hook is called when rendering the tabs for a contact (q=civicrm/contact/view)c
-   *
-   * @param array $tabs
-   *   The array of tabs that will be displayed.
-   * @param int $contactID
-   *   The contactID for whom the dashboard is being rendered.
-   *
-   * @return null
-   * @deprecated Use tabset() instead.
-   */
-  public static function tabs(&$tabs, $contactID) {
-    return self::singleton()->invoke(['tabs', 'contactID'], $tabs, $contactID,
-      self::$_nullObject, self::$_nullObject, self::$_nullObject, self::$_nullObject, 'civicrm_tabs'
-    );
-  }
-
   /**
    * This hook is called when rendering the tabs used for events and potentially
    * contribution pages, etc.