remove custom assembly logic
remove custom assembly logic

Original commit: elastic/x-pack-elasticsearch@4dc9f449949a3aeb11697e6c204ff8106de77032

uschindler/elasticsearch,strapdata/elassandra,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,coding0011/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,robin13/elasticsearch,scorpionvicky/elasticsearch,gfyoung/elasticsearch,uschindler/elasticsearch,strapdata/elassandra,scorpionvicky/elasticsearch,HonzaKral/elasticsearch,GlenRSmith/elasticsearch,nknize/elasticsearch,vroyer/elassandra,GlenRSmith/elasticsearch,robin13/elasticsearch,nknize/elasticsearch,uschindler/elasticsearch,gingerwizard/elasticsearch,strapdata/elassandra,gfyoung/elasticsearch,nknize/elasticsearch,gfyoung/elasticsearch,GlenRSmith/elasticsearch,robin13/elasticsearch,robin13/elasticsearch,nknize/elasticsearch,robin13/elasticsearch,gingerwizard/elasticsearch,uschindler/elasticsearch,gingerwizard/elasticsearch,gfyoung/elasticsearch,HonzaKral/elasticsearch,coding0011/elasticsearch,vroyer/elassandra,HonzaKral/elasticsearch,coding0011/elasticsearch,gingerwizard/elasticsearch,coding0011/elasticsearch,strapdata/elassandra,vroyer/elassandra,coding0011/elasticsearch,uschindler/elasticsearch,GlenRSmith/elasticsearch,nknize/elasticsearch,strapdata/elassandra,gfyoung/elasticsearch,GlenRSmith/elasticsearch,HonzaKral/elasticsearch