drop unused index at lib
drop unused index at lib

jhipster/generator-jhipster,jhipster/generator-jhipster,atomfrede/generator-jhipster,atomfrede/generator-jhipster,jhipster/generator-jhipster,jhipster/generator-jhipster,atomfrede/generator-jhipster,jhipster/generator-jhipster,atomfrede/generator-jhipster,atomfrede/generator-jhipster