Fix broken links to inner class constructors.

This reverts aosp/166050 which added this workaround. It is no
longer needed since we have updated all of the usages to the
correct syntax.

Bug: 6963924
Bug: 18051133
Test: make doc-comment-check-docs
Change-Id: Iab578046a562d110be0833f51c762224baa2745e