Remove unused imports

h2/src/main/org/h2/command/dml/Select.java

@@ -7,11 +7,9 @@ package org.h2.command.dml;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Comparator;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
-import java.util.TreeMap;
 import org.h2.api.ErrorCode;
 import org.h2.api.Trigger;
 import org.h2.command.CommandInterface;
@@ -48,7 +46,6 @@ import org.h2.util.ColumnNamer;
 import org.h2.util.StatementBuilder;
 import org.h2.util.StringUtils;
 import org.h2.util.Utils;
-import org.h2.value.CompareMode;
 import org.h2.value.Value;
 import org.h2.value.ValueArray;
 import org.h2.value.ValueNull;

h2/src/main/org/h2/expression/ExpressionColumn.java

@@ -5,7 +5,6 @@
  */
 package org.h2.expression;
 
-import java.util.HashMap;
 import org.h2.api.ErrorCode;
 import org.h2.command.Parser;
 import org.h2.command.dml.Select;

h2/src/main/org/h2/expression/JavaAggregate.java

@@ -7,7 +7,6 @@ package org.h2.expression;
 
 import java.sql.Connection;
 import java.sql.SQLException;
-import java.util.HashMap;
 import org.h2.api.Aggregate;
 import org.h2.api.ErrorCode;
 import org.h2.command.Parser;