remove dead code

Signed-off-by: Murphy <mofei@starrocks.com>

fe/fe-core/src/main/java/com/starrocks/sql/optimizer/statistics/Bucket.java

@@ -15,11 +15,9 @@
 
 package com.starrocks.sql.optimizer.statistics;
 
-import org.jetbrains.annotations.NotNull;
-
 import java.util.Objects;
 
-public class Bucket implements Comparable<Bucket> {
+public class Bucket {
     private final double lower;
     private final double upper;
     private final Long count;
@@ -48,19 +46,6 @@ public Long getUpperRepeats() {
         return upperRepeats;
     }
 
-    public boolean isOverlapped(Bucket other) {
-        return Math.min(upper, other.upper) - Math.max(lower, other.lower) >= 0;
-    }
-
-    @Override
-    public int compareTo(@NotNull Bucket o) {
-        int lowerComparison = Double.compare(this.lower, o.lower);
-        if (lowerComparison != 0) {
-            return lowerComparison;
-        }
-        return Double.compare(this.upper, o.upper);
-    }
-
     @Override
     public boolean equals(Object o) {
         if (this == o) {

fe/fe-core/src/main/java/com/starrocks/sql/optimizer/statistics/StatisticRangeValues.java

@@ -111,19 +111,6 @@ public double overlapPercentWith(@NotNull StatisticRangeValues other) {
         return StatisticsEstimateCoefficient.OVERLAP_INFINITE_RANGE_FILTER_COEFFICIENT;
     }
 
-    double overlapLength(StatisticRangeValues other) {
-        if (this.isEmpty() || other.isEmpty()) {
-            return 0.0;
-        }
-        // If the low and high values is infinite, it represents either string type or unknown of column statistics.
-        if (this.equals(other) && !isBothInfinite()) {
-            return 1.0;
-        }
-
-        double lengthOfIntersect = min(this.high, other.high) - max(this.low, other.low);
-        return lengthOfIntersect;
-    }
-
     public StatisticRangeValues intersect(StatisticRangeValues other) {
         double newLow = max(low, other.low);
         double newHigh = min(high, other.high);