Update loader flags

README.md

@@ -47,7 +47,7 @@ Loader needs 2 directories:
 
 ```
 $ cd $GOPATH/src/github.com/dgraph-io/dgraph/server/loader
-$ go build . && ./loader --rdfgzips=path_of_benchmarks_dir/data/rdf-films.gz,path_of_benchmarks_dir/data/names.gz --mutations DIRPATH/m --postings DIRPATH/p
+$ go build . && ./loader --rdfgzips=path_of_benchmarks_dir/data/rdf-films.gz,path_of_benchmarks_dir/data/names.gz --postings DIRPATH/p
 ```
 
 ## Querying

server/loader/main.go

@@ -36,8 +36,6 @@ var glog = x.Log("loader_main")
 var rdfGzips = flag.String("rdfgzips", "",
 	"Comma separated gzip files containing RDF data")
 var mod = flag.Uint64("mod", 1, "Only pick entities, where uid % mod == 0.")
-var numgo = flag.Int("numgo", 4,
-	"Number of goroutines to use for reading file.")
 var postingDir = flag.String("postings", "", "Directory to store posting lists")
 var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")