Remove `@link` to ProxyMockMaker from main Mockito javadoc (#2535)
Remove `@link` to ProxyMockMaker from main Mockito javadoc (#2535)

We shouldn't be directly linking to specific extensions. For users that want to use
Mockito with a specific extension, we only want to load the appropriate one and
avoid loading any others.

Follow-up to 80e1cc91d66e7cf6e188b2dee26deba81f4b885f
mockito/mockito,mockito/mockito,bric3/mockito,mockito/mockito,bric3/mockito,bric3/mockito