Remove decoupler network file validation from main workflow

Author: antoniasaracco

workflows/differentialabundance.nf

@@ -104,7 +104,7 @@ workflow DIFFERENTIALABUNDANCE {
 
     ch_gene_sets = ch_paramsets
         .map { meta ->
-            if (meta.params.functional_method == 'decoupler' && meta.params.decoupler_network) {
+            if (meta.params.functional_method == 'decoupler') {
                 [ meta, [file(meta.params.decoupler_network, checkIfExists: true)] ]
             } else {
                 [ meta, meta.params.gene_sets_files ? meta.params.gene_sets_files.split(",").collect { file(it, checkIfExists: true) } : [] ]