  Mitigating crosstalk errors, whether classical or quantum mechanical, is
critically important for achieving high-fidelity entangling gates in
multi-qubit circuits. For weakly anharmonic superconducting qubits, unwanted
$ZZ$ interactions can be suppressed by combining qubits with opposite
anharmonicity. We present experimental measurements and theoretical modeling of
two-qubit gate error for gates based on the cross resonance interaction between
a capacitively shunted flux qubit and a transmon and demonstrate the
elimination of the $ZZ$ interaction.
