diff --git a/source/substitution.d b/source/substitution.d
index 0937dc2..e10bf65 100644
--- a/source/substitution.d
+++ b/source/substitution.d
@@ -5,7 +5,6 @@ public:
 void loadSubstitutionFile(string fileName)
 {
     import std.file : slurp, exists, isFile;
-    import std.array : assocArray;
     import std.algorithm.iteration : each;
 
     if (fileName.exists && fileName.isFile)
@@ -13,11 +12,6 @@ void loadSubstitutionFile(string fileName)
         auto data = slurp!(string, string)(fileName, `"%s" = "%s"`);
         map = (string[string]).init;
         data.each!(pair => map[pair[0]] = pair[1]);
-        foreach (pair; data)
-        {
-            map[pair[0]] = pair[1];
-        }
-        map.rehash;
     }
     else
     {