removed active instance count from rational class

app/common/rational.cpp

@@ -3,19 +3,12 @@
 
 #include "rational.h"
 
-int rational::activeInstances = 0;
-
 rational::rational(const AVRational &r) :
   numer(r.num),
   denom(r.den)
 {
 }
 
-rational::~rational()
-{
-  activeInstances--;
-}
-
 //Function: print number to cout
 
 void rational::print(ostream &out) const
@@ -108,13 +101,6 @@ bool rational::isNull() const
   return denominator() == 0;
 }
 
-//Function: get active instances
-
-int rational::getActiveInstances()
-{
-  return activeInstances;
-}
-
 const intType &rational::numerator() const
 {
   return numer;