Only one config for normalizers.

This applies for both bigwig files and RPM-based stuff, and maybe
also for other outputs.

small_RNA-seq/small_RNA-seq.snakefile

@@ -515,9 +515,10 @@ TESTED_SIZE_FACTORS = ["mapped", "non_structural", "all_sisiuRNA", "piRNA", "miR
 # and then substraction of a pseudocount, in order to deal with zero counts.
 # This seems to perform well (see "test_size_factor" results).
 DE_SIZE_FACTORS = ["non_structural", "median_ratio_to_pseudo_ref"]
-SIZE_FACTORS = ["non_structural", "piRNA"]
+SIZE_FACTORS = config.get("size_factors", ["non_structural"])
 #NORMALIZER = "median_ratio_to_pseudo_ref"
-RPM_NORMS = config.get("rpm_norms", SIZE_FACTORS)
+# Do we really need distinct lists of normalizers?
+RPM_NORMS = SIZE_FACTORS
 RPM_FOLD_TYPES = [
     f"mean_log2_RPM_by_{norm}_fold"
     for norm in RPM_NORMS]