Remove framework version of UnspecifiedRegisterReceiverFlag lint

This check has been upstreamed to Android Studio, and the platform now
uses that version of the studio lint checks. Thus, the platform version
is redundant (and outdated).

Bug: 267510341
Test: TH
Test: manually tested by running lint and ensuring warnings were
reported in e.g. packages/services/Telecomm/Telecom.

Change-Id: I1c8f8776831e336e77326ae15a113d18c7a036e4