Remove unnecessary removeContextObject calls

They are removed on deletion now.

Change-Id: I08461ea4938e24ab450df013a0f8f820032381da
Reviewed-by: hjk <hjk@qt.io>

src/plugins/android/androidmanifesteditorwidget.h

@@ -79,7 +79,6 @@ class AndroidManifestTextEditorWidget : public TextEditor::TextEditorWidget
 {
 public:
     explicit AndroidManifestTextEditorWidget(AndroidManifestEditorWidget *parent);
-    ~AndroidManifestTextEditorWidget() override;
 
 private:
     Core::IContext *m_context;