remove 'develop' branch from Travis CI
remove 'develop' branch from Travis CI

reedloden/backup,backup/backup,zBMNForks/backup,interu/backup,pollosp/backup,otzy007/backup,tian-xiaobo/backup,zBMNForks/backup,martincik/backup,zires/backup,hiphapis/backup,otzy007/backup,ccoenen/backup,pawelduda/backup,rics3n/backup,martincik/backup,scalp42/backup,pawelduda/backup,ccoenen/backup,interu/backup,scalp42/backup,McStork/backup,McStork/backup,pollosp/backup,McStork/backup,zBMNForks/backup,interu/backup,skcript/backup,backup/backup,pollosp/backup,otzy007/backup,rics3n/backup,hiphapis/backup,scalp42/backup,zires/backup,skcript/backup,bernd/backup,rics3n/backup,martincik/backup,tian-xiaobo/backup,zires/backup,ccoenen/backup,skcript/backup,reedloden/backup,pawelduda/backup,tian-xiaobo/backup,bernd/backup,reedloden/backup,hiphapis/backup,backup/backup