obidemerge: set demerge on sample the default

pkg/obitools/obidemerge/demerge.go

@@ -33,12 +33,6 @@ func MakeDemergeWorker(key string) obiseq.SeqWorker {
 }
 
 func CLIDemergeSequences(iterator obiiter.IBioSequence) obiiter.IBioSequence {
-
-	if CLIHasSlotToDemerge() {
-
-		worker := MakeDemergeWorker(CLIDemergeSlot())
-		return iterator.MakeIWorker(worker, false, obioptions.CLIParallelWorkers(), 0)
-	}
-
-	return iterator
+	worker := MakeDemergeWorker(CLIDemergeSlot())
+	return iterator.MakeIWorker(worker, false, obioptions.CLIParallelWorkers(), 0)
 }

pkg/obitools/obidemerge/options.go

@@ -5,7 +5,7 @@ import (
 	"github.com/DavidGamba/go-getoptions"
 )
 
-var _Demerge = ""
+var _Demerge = "sample"
 
 func DemergeOptionSet(options *getoptions.GetOpt) {
 
@@ -24,7 +24,3 @@ func OptionSet(options *getoptions.GetOpt) {
 func CLIDemergeSlot() string {
 	return _Demerge
 }
-
-func CLIHasSlotToDemerge() bool {
-	return _Demerge != ""
-}