JS: Remove unnecessary override in OriginalExportDeclaration

Author: asgerf

javascript/ql/lib/semmle/javascript/ES2015Modules.qll

@@ -820,12 +820,6 @@ class SelectiveReExportDeclaration extends ReExportDeclaration, ExportNamedDecla
 class OriginalExportDeclaration extends ExportDeclaration {
   OriginalExportDeclaration() { not this instanceof ReExportDeclaration }
 
-  overlay[global]
-  override predicate exportsAs(LexicalName v, string name) {
-    this.(ExportDefaultDeclaration).exportsAs(v, name) or
-    this.(ExportNamedDeclaration).exportsAs(v, name)
-  }
-
   overlay[global]
   override DataFlow::Node getSourceNode(string name) {
     result = this.(ExportDefaultDeclaration).getSourceNode(name) or