When you run an installer, then you get a choice to deselect to install certain plugins.
When you installed the first time, you should have got this possibility, if you read the text in the dialog boxes, during the install. At least i get this option on Windows, so i assume it's the same on a MAC.
In Silent install you don't get this option.
If you have the plugins installed, then you will get then again, when you update, unless you select not to install them.