You can't uninstall it in the real sense as many programs rely on the underlying engine.
Turn pictures off in internet options and see how many programs actually use IE in some shape or form. How the EU expects MS to untangle the browser out of the OS is beyond me.
Please, can someone confirm this or deny it, has Trident been removed from Win 7 or not?
If not, this argument is moot. Trident is still there and 3rd party writers can still use it. But even if it was, the issue is that 3rd party developers and MS should get their act together and remedy this issue by alternative means - eg write code differently. MS committed a crime by fusing IE with Windows - there was no real good technical reason to do it, instead it brought out security issues and was only done to cement IE's dominance on the Windows platform.
MS committed a crime, they lied to the US government about it, under oath. They were not punished. Now the EC is seeking retribution for the crime. If someone stabs you, it's not enough they take the knife out of you, they have to pay for their crime. They have to fix your wound and take measure to prevent them from stabbing you again. This is exactly the same.