If you save your game as a project in it's own folder, then use a text editor to open the .caproj file, you will see the XML details of your project.
The part of interest looks like below:
<used-plugins>
<plugin author="Scirra" id="Audio" version="1">Audio</plugin>
<plugin author="Scirra" id="Button" version="1">Button</plugin>
<plugin author="Scirra" id="Keyboard" version="1">Keyboard</plugin>
<plugin author="Scirra" id="Sprite" version="1">Sprite</plugin>
<plugin author="Scirra" id="Text" version="1">Text</plugin>
<plugin author="Scirra" id="TextBox" version="1">Text box</plugin>
<plugin author="Scirra" id="Touch" version="1">Touch</plugin>
</used-plugins>
<used-behaviors />
Your plugins and behaviors should say scirra. If there is some/any that don't, then you haven't removed them fully.