The diagram does not say removed/restored, it says added and removed.
This is because SSL is supposed to provide security on the Internet, where your data transits through semi random routing point you do not trust. That is the left part of the diagram. The right part of the diagram is Google's private infrastructure, where SSL is not needed. Google only recently realized that encryption is also necessary on its private infrastructure, but they are certainly not using SSL for this, but probably their own private encryption which may be both more powerful and simpler than SSL, because they can taylor it to their needs, and they don't need to wait for every browser out there to implement it, as they own both ends.
The central linking point between the two network is not where the NSA dastardly messes with SSL certificates because the protocol is broken; it is the point where Google removes the SSL (when going left to right) or adds the SSL (right to left) because it does not make sense to use SSL on the private infrastructure…
Just explaining, since, you know, you obviously can read diagrams but you apparently have trouble understanding the information.