Remove CommRelease.entitlements reference from project.pbxproj

Summary: This differential removes reference to non-existing CommRelease.entitlements file from project.pbxproj.

Test Plan: Build debug and release version of the app after deleting CommRelease through XCode GUI (initially it should be visibile highlited in reed)

Reviewers: tomek, atul

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D5799