resourceloader: Avoid duplicate existence check

The check above with the mw.loader.register( name ) ensures that
  hasOwn.call( registry, name )
is always true.

Change-Id: I10e2a23bd5c11fbf53fd4fc59ba2e5d94f157254

diff --git a/resources/src/startup/mediawiki.js b/resources/src/startup/mediawiki.js
index f927aad..e665403 100644 (file)
--- a/resources/src/startup/mediawiki.js
+++ b/resources/src/startup/mediawiki.js
@@ -1828,7 +1828,7 @@
                                                mw.loader.register( name );
                                        }
                                        // Check for duplicate implementation
-                                       if ( hasOwn.call( registry, name ) && registry[ name ].script !== undefined ) {
+                                       if ( registry[ name ].script !== undefined ) {
                                                throw new Error( 'module already implemented: ' + name );
                                        }
                                        if ( version ) {