make everything use same random number generator

src/main/java/Equations.java

@@ -4,10 +4,6 @@ import java.math.MathContext;
 
 public abstract class Equations {
 
-    public static int getRandomInt(int min, int max) {
-        return (int) ((Math.random() * (max - min)) + min);
-    }
-
     //pValue calculation as described in original pairSEQ paper.
     //Included for comparison with original results.
     //Not used by BiGpairSEQ for matching.