[Firebase 12]: Remove select deprecated API

[ncooke3]

Description

 git -p grep -e "__deprecated_msg" -e "__attribute__((deprecated))" -e "DEPRECATED_MSG_ATTRIBUTE" -e "deprecated:" -e "deprecated," -C 5 --color -- ':*.h' ':*.swift'  | cat 

Placeholder issue for removing deprecated API:

1. See this comment ([Auth] Add Swift 6 conformance to FirebaseAuth/Sources/Swift/ActionCode/ directory #14833 (review))

API Proposal

No response

Firebase Product(s)

Authentication

[ncooke3]

Audit

Firestore

Leaving the following alone.

• Firestore/Source/Public/FirebaseFirestore/FIRFirestore.h
• Firestore/Source/Public/FirebaseFirestore/FIRFirestoreSettings.h

AI

• totalBillableCharacters (#15056)

Auth

Leaving the following alone.

• Deprecated ObjC constants?
• fetchSignInMethods
  • Going to keep for now. Still relevant for old projects.
• updateEmail(to email:completion:)
  • Going to keep for now. Still relevant for old projects.

Storage

• Unused, long-deprecated StorageMetadata.storageReference

Analytics

• Remove ODM1 organized pods

[ncooke3]

@paulb777 , do we want to remove totalBillableCharacters?

[paulb777]

@paulb777 , do we want to remove totalBillableCharacters?

Yes. cc: @andrewheard

[ncooke3]

Closing. Will not address the FST ones yet.