Update removed category for v3.0

[Mottie]

The removed category page needs to be updated for jQuery v3.0+. In most cases the "removed: 3.0" in the header of each page is also missing.

I don't have an extensive list of removed items, but so far I've found:

Item	Deprecated	Removed
.andSelf()	1.8	3.0
.error	1.8	3.0
.load	1.8	3.0
.size()	1.8	3.0
.unload	1.8	3.0
.context	1.10	3.0