Removed `scope` from authorization code exchange token request. Section 4.1.3 of RFC 6749 does not document scope as an allowed parameter.
Removed `scope` from authorization code exchange token request.
Section 4.1.3 of RFC 6749 does not document scope as an allowed parameter.

openid/AppAuth-iOS,WilliamDenniss/AppAuth-iOS,WilliamDenniss/AppAuth-iOS,openid/AppAuth-iOS,openid/AppAuth-iOS,WilliamDenniss/AppAuth-iOS