diff --git a/src/Composer/Package/RootPackageInterface.php b/src/Composer/Package/RootPackageInterface.php
index ad1828570..ef1ab7549 100644
--- a/src/Composer/Package/RootPackageInterface.php
+++ b/src/Composer/Package/RootPackageInterface.php
@@ -115,15 +115,6 @@ interface RootPackageInterface extends CompletePackageInterface
      */
     public function setReplaces(array $replaces): void;
 
-    /**
-     * Set the repositories
-     *
-     * @param mixed[] $repositories
-     *
-     * @return void
-     */
-    public function setRepositories(array $repositories): void;
-
     /**
      * Set the autoload mapping
      *