Removed unnecessary Disposer.register of the Query result editor since FileEditorManagerImpl.closeAllFiles also disposes when the project is closed. Fixes "DisposalException: Double release of editor" (#211)

Author: jimkyndemeyer

src/main/com/intellij/lang/jsgraphql/ide/project/JSGraphQLLanguageUIProjectService.java

@@ -683,8 +683,6 @@ public void mouseClicked(MouseEvent e) {
             editorEx.setPermanentHeaderComponent(header);
         }
 
-        Disposer.register(this, fileEditor);
-
         final ContentImpl content = new ContentImpl(fileEditor.getComponent(), "Query result", true);
         content.setCloseable(false);
         toolWindow.getContentManager().addContent(content);