Revert "split log norm"

This reverts commit dc85298.

Author: guoyongzhi

src/detector.jl

@@ -79,17 +79,8 @@ function load_profile(lang, ngramrange::AbstractRange, cutoff, vocabularyrange)
 end
 
 function normalize_profile!(P)
-    sums = zeros(7)
-    for (k, v) in P
-        sums[length(k)] += v
-    end
-    weights = log1p.(sums)
-    weights .*= sum(weights .!= 0) / sum(weights) # mean(weights) == 1
-    scale = weights ./ sums
-    logscale = log.(scale)
-    for (k, v) in P
-        P[k] = log(v) + logscale[length(k)]
-    end
+    vs = sum(values(P))
+    map!(v -> log(v / vs), values(P))
     P
 end