remove unused imports
remove unused imports

Scalr/libcloud,illfelder/libcloud,Scalr/libcloud,illfelder/libcloud,ZuluPro/libcloud,vongazman/libcloud,t-tran/libcloud,mistio/libcloud,erjohnso/libcloud,ZuluPro/libcloud,techhat/libcloud,ZuluPro/libcloud,Kami/libcloud,mistio/libcloud,vongazman/libcloud,apache/libcloud,pquentin/libcloud,pquentin/libcloud,apache/libcloud,t-tran/libcloud,Kami/libcloud,samuelchong/libcloud,techhat/libcloud,pquentin/libcloud,samuelchong/libcloud,samuelchong/libcloud,techhat/libcloud,ByteInternet/libcloud,andrewsomething/libcloud,vongazman/libcloud,erjohnso/libcloud,illfelder/libcloud,t-tran/libcloud,Kami/libcloud,ByteInternet/libcloud,mistio/libcloud,ByteInternet/libcloud,Scalr/libcloud,andrewsomething/libcloud,StackPointCloud/libcloud,apache/libcloud,erjohnso/libcloud,andrewsomething/libcloud,StackPointCloud/libcloud,StackPointCloud/libcloud