Fix warnings in LeCmacVerifier

lecmacverifier.cpp:99:6: warning: unused parameter ‘message’ [-Wunused-parameter]
 bool LeCmacVerifier::verify(const QByteArray &message, const quint128 &csrk,
                                               ^
lecmacverifier.cpp:99:6: warning: unused parameter ‘csrk’ [-Wunused-parameter]
lecmacverifier.cpp:99:6: warning: unused parameter ‘expectedMac’ [-Wunused-parameter]

Change-Id: I3ae882ebbc967d6694151e90d7463c88a05a8529
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>