Oh no, the "well regulated militia" part has always been there. What is NOT there is your interpretation of it.
You see comrade, when you have "a well regulated militia" AND "the right to bear arms shall not be infringed", in the same amendment it means you have to consider BOTH parts. In other words, "well regulated" means being in effective shape to fight. What it does NOT mean is being subject to screaming diaper dopers and their whims.
You're welcome.