[iOS SDK] Remove MFA and JIT Private Preview tag

[spetrescu84]

Proposed changes

As we are going into public preview with this feature, I have removed the MFA and JIT Private Preview tag and logs

Type of change

• Feature work
• Bug fix
• Documentation
• Engineering change
• Test
• Logging/Telemetry

Risk

• High – Errors could cause MAJOR regression of many scenarios. (Example: new large features or high level infrastructure changes)
• Medium – Errors could cause regression of 1 or more scenarios. (Example: somewhat complex bug fixes, small new features)
• Small – No issues are expected. (Example: Very small bug fixes, string changes, or configuration settings changes)

Additional information

[mustafamizrak]

MSAL/test/unit/MSALPublicClientApplicationTests.m needs to be changed also I guess.

[mustafamizrak]

Also, worth to remove this one:

microsoft-authentication-library-for-objc/MSAL/src/native_auth/MSALNativeAuthLogMessage.swift

Line 28 in 46c389d

static let privatePreviewLog =

[spetrescu84]

MSAL/test/unit/MSALPublicClientApplicationTests.m needs to be changed also I guess.

That test is not ours, not sure what it is about but quite sure we didn't write it and we shouldn't touch it :D

[spetrescu84]

Also, worth to remove this one:

microsoft-authentication-library-for-objc/MSAL/src/native_auth/MSALNativeAuthLogMessage.swift

Line 28 in 46c389d

static let privatePreviewLog =

We could remove it indeed, but we might it reuse it in the future soon for the new features going in Private Preview.
@nilo-ms what do you think?