introduce bitloops

src/main/java/puzzle/Export.java

@@ -127,27 +127,6 @@ public record Export() {
       }
    }
    
-   static class Bit {
-      
-      long l1, l2;
-      public boolean get(int bitIndex) {
-         if ((bitIndex & 64) == 0) return (l1 & (1L << bitIndex)) != 0L;
-         return (l2 & (1L << (bitIndex & 63))) != 0L;
-      }
-      public void set(int bitIndex) {
-         if ((bitIndex & 64) == 0) this.l1 |= 1L << bitIndex;
-         else this.l2 |= 1L << (bitIndex & 63);
-      }
-      public void or(long lo, long hi) {
-         this.l1 |= lo;
-         this.l2 |= hi;
-      }
-      public void clear() {
-         l1 = 0L;
-         l2 = 0L;
-      }
-   }
-   
    record Bit1029(long[] bits) {
       
       public Bit1029()                   { this(new long[2048]); }