Remove dead code in pkcs11-keygen.c

cppcheck reports the following:

        <error id="nullPointer" severity="error" msg="Possible null pointer dereference: param_template" verbose="Possible null pointer dereference: param_template">
            <location file="bin/pkcs11/pkcs11-keygen.c" line="485"/>
        </error>
        <error id="nullPointer" severity="error" msg="Possible null pointer dereference: param_template" verbose="Possible null pointer dereference: param_template">
            <location file="bin/pkcs11/pkcs11-keygen.c" line="489"/>
        </error>
        <error id="nullPointer" severity="error" msg="Possible null pointer dereference: param_template" verbose="Possible null pointer dereference: param_template">
            <location file="bin/pkcs11/pkcs11-keygen.c" line="490"/>
        </error>

on examination this code is not called and the loop count is always zero.