Removed several unnecessary forward declarations of ConstantsComparator.

src/storm/builder/ExplicitModelBuilder.h

@@ -32,9 +32,6 @@
 #include "storm/generator/VariableInformation.h"
 
 namespace storm {
-    namespace utility {
-        template<typename ValueType> class ConstantsComparator;
-    }
     
     namespace builder {
         

src/storm/storage/bisimulation/BisimulationDecomposition.h

@@ -16,10 +16,6 @@
 #include "storm/utility/ConstantsComparator.h"
 
 namespace storm {
-    namespace utility {
-        template <typename ValueType> class ConstantsComparator;
-    }
-    
     namespace logic {
         class Formula;
     }

src/storm/storage/bisimulation/DeterministicModelBisimulationDecomposition.h

@@ -5,10 +5,6 @@
 #include "storm/storage/bisimulation/DeterministicBlockData.h"
 
 namespace storm {
-    namespace utility {
-        template <typename ValueType> class ConstantsComparator;
-    }
-    
     namespace storage {
         
         /*!

src/storm/storage/bisimulation/NondeterministicModelBisimulationDecomposition.h

@@ -7,10 +7,6 @@
 #include "storm/storage/DistributionWithReward.h"
 
 namespace storm {
-    namespace utility {
-        template <typename ValueType> class ConstantsComparator;
-    }
-    
     namespace storage {
         
         /*!