[FIX] Removed debugging-help variable from DataSet constructor.

src/DataSet/DataSet.cpp

@@ -210,9 +210,7 @@ namespace lib4neuro {
                                                                                                                                                   find_min_out(*data_ptr),
                                                                                                                                                   find_max_out(*data_ptr),
                                                                                                                                                   -1,
-                                                                                                                                                  1)) {
-        int a = 1;
-    }
+                                                                                                                                                  1)) {}
 
     DataSet::DataSet(const std::vector<std::pair<std::vector<double>, std::vector<double>>>* data_ptr,
                      const std::shared_ptr<NormalizationStrategy>& ns) {