Fixes bug 728194 - Removed obsolete function `sig_exists` from report model.
Fixes bug 728194 - Removed obsolete function `sig_exists` from report model.

linearregression/socorro,pcabido/socorro,yglazko/socorro,pcabido/socorro,KaiRo-at/socorro,AdrianGaudebert/socorro,bsmedberg/socorro,lonnen/socorro,twobraids/socorro,mozilla/socorro,luser/socorro,rhelmer/socorro,KaiRo-at/socorro,mozilla/socorro,Tayamarn/socorro,KaiRo-at/socorro,luser/socorro,pcabido/socorro,Tayamarn/socorro,twobraids/socorro,rhelmer/socorro,cliqz/socorro,bsmedberg/socorro,Tchanders/socorro,yglazko/socorro,Tayamarn/socorro,Tayamarn/socorro,lonnen/socorro,Tayamarn/socorro,adngdb/socorro,KaiRo-at/socorro,luser/socorro,m8ttyB/socorro,linearregression/socorro,linearregression/socorro,adngdb/socorro,Tchanders/socorro,spthaolt/socorro,Serg09/socorro,Tayamarn/socorro,rhelmer/socorro,AdrianGaudebert/socorro,linearregression/socorro,cliqz/socorro,adngdb/socorro,yglazko/socorro,spthaolt/socorro,pcabido/socorro,Serg09/socorro,Tchanders/socorro,cliqz/socorro,m8ttyB/socorro,Tchanders/socorro,twobraids/socorro,mozilla/socorro,KaiRo-at/socorro,pcabido/socorro,lonnen/socorro,AdrianGaudebert/socorro,pcabido/socorro,bsmedberg/socorro,AdrianGaudebert/socorro,yglazko/socorro,spthaolt/socorro,spthaolt/socorro,Tchanders/socorro,m8ttyB/socorro,rhelmer/socorro,yglazko/socorro,linearregression/socorro,adngdb/socorro,m8ttyB/socorro,cliqz/socorro,cliqz/socorro,Serg09/socorro,spthaolt/socorro,mozilla/socorro,twobraids/socorro,lonnen/socorro,Serg09/socorro,twobraids/socorro,luser/socorro,m8ttyB/socorro,AdrianGaudebert/socorro,rhelmer/socorro,KaiRo-at/socorro,rhelmer/socorro,Serg09/socorro,adngdb/socorro,twobraids/socorro,luser/socorro,linearregression/socorro,luser/socorro,bsmedberg/socorro,mozilla/socorro,yglazko/socorro,AdrianGaudebert/socorro,Tchanders/socorro,mozilla/socorro,Serg09/socorro,m8ttyB/socorro,cliqz/socorro,spthaolt/socorro,bsmedberg/socorro,adngdb/socorro