Remove conscrypt.module.intra.core.api.stubs from apex white list

It is no longer needed because non-static java_library dependencies are
not considered to be part of the depending APEX.

Bug: 153443117
Bug: 153306490
Test: m nothing
Merged-In: I7d58d1047b2d400395a253e492b35008284778ff
Change-Id: I7d58d1047b2d400395a253e492b35008284778ff