Deleted unreachable code.

feature_index is initiated to 0
v_array.size() is always >=0
Therefore, (ecsub->audit_features[*i].size() >= feature_index) is always true,
but the condition is negated,
so the deleted auditing code is never executed.
Therefore, ec->audit_features[wap_ldf_namespace] is empty and there is no need to clean it.
Merge pull request #461 from martinpopel/wap_ldf_audit

wap_ldf audit does not work