diff --git a/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/util/ArrayUtils.java b/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/util/ArrayUtils.java
deleted file mode 100644
index 73c9e011c78..00000000000
--- a/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/util/ArrayUtils.java
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
- */
-package org.elasticsearch.xpack.sql.jdbc.util;
-
-import org.elasticsearch.xpack.sql.jdbc.JdbcSQLException;
-
-import java.sql.SQLException;
-
-// taken from org.apache.lucene.util
-abstract class ArrayUtils {
-
-    static byte[] grow(byte[] array, int minSize) throws SQLException {
-        assert minSize >= 0 : "size must be positive (got " + minSize + "): likely integer overflow?";
-        if (array.length < minSize) {
-            byte[] newArray = new byte[oversize(minSize, 1)];
-            System.arraycopy(array, 0, newArray, 0, array.length);
-            return newArray;
-        }
-        else return array;
-    }
-
-    static int oversize(int minTargetSize, int bytesPerElement) throws SQLException {
-
-        if (minTargetSize < 0) {
-            // catch usage that accidentally overflows int
-            throw new JdbcSQLException("invalid array size [" + minTargetSize + "]");
-        }
-
-        if (minTargetSize == 0) {
-            // wait until at least one element is requested
-            return 0;
-        }
-
-        // asymptotic exponential growth by 1/8th, favors
-        // spending a bit more CPU to not tie up too much wasted
-        // RAM:
-        int extra = minTargetSize >> 3;
-
-        if (extra < 3) {
-            // for very small arrays, where constant overhead of
-            // realloc is presumably relatively high, we grow
-            // faster
-            extra = 3;
-        }
-
-        int newSize = minTargetSize + extra;
-
-        // add 7 to allow for worst case byte alignment addition below:
-        if (newSize + 7 < 0) {
-            // int overflowed -- return max allowed array size
-            return Integer.MAX_VALUE;
-        }
-
-        if (Constants.JRE_IS_64BIT) {
-            // round up to 8 byte alignment in 64bit env
-            switch (bytesPerElement) {
-                case 4:
-                    // round up to multiple of 2
-                    return (newSize + 1) & 0x7ffffffe;
-                case 2:
-                    // round up to multiple of 4
-                    return (newSize + 3) & 0x7ffffffc;
-                case 1:
-                    // round up to multiple of 8
-                    return (newSize + 7) & 0x7ffffff8;
-                case 8:
-                    // no rounding
-                default:
-                    // odd (invalid?) size
-                    return newSize;
-            }
-        }
-        else {
-            // round up to 4 byte alignment in 64bit env
-            switch (bytesPerElement) {
-                case 2:
-                    // round up to multiple of 2
-                    return (newSize + 1) & 0x7ffffffe;
-                case 1:
-                    // round up to multiple of 4
-                    return (newSize + 3) & 0x7ffffffc;
-                case 4:
-                case 8:
-                    // no rounding
-                default:
-                    // odd (invalid?) size
-                    return newSize;
-            }
-        }
-    }
-}
diff --git a/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/util/Constants.java b/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/util/Constants.java
deleted file mode 100644
index a7b937fb223..00000000000
--- a/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/util/Constants.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
- */
-package org.elasticsearch.xpack.sql.jdbc.util;
-
-import java.util.StringTokenizer;
-
-//taken from Apache Lucene
-public abstract class Constants {
-
-    /** JVM vendor info. */
-    public static final String JVM_VENDOR = System.getProperty("java.vm.vendor");
-    public static final String JVM_VERSION = System.getProperty("java.vm.version");
-    public static final String JVM_NAME = System.getProperty("java.vm.name");
-    public static final String JVM_SPEC_VERSION = System.getProperty("java.specification.version");
-
-    /** The value of <tt>System.getProperty("java.version")</tt>. **/
-    public static final String JAVA_VERSION = System.getProperty("java.version");
-
-    public static final String OS_ARCH = System.getProperty("os.arch");
-    public static final String OS_VERSION = System.getProperty("os.version");
-    public static final String JAVA_VENDOR = System.getProperty("java.vendor");
-
-    private static final int JVM_MAJOR_VERSION;
-    private static final int JVM_MINOR_VERSION;
-
-    /** True iff running on a 64bit JVM */
-    public static final boolean JRE_IS_64BIT;
-
-    static {
-        final StringTokenizer st = new StringTokenizer(JVM_SPEC_VERSION, ".");
-        JVM_MAJOR_VERSION = Integer.parseInt(st.nextToken());
-        if (st.hasMoreTokens()) {
-            JVM_MINOR_VERSION = Integer.parseInt(st.nextToken());
-        }
-        else {
-            JVM_MINOR_VERSION = 0;
-        }
-        boolean is64Bit = false;
-        final String x = System.getProperty("sun.arch.data.model");
-        if (x != null) {
-            is64Bit = x.contains("64");
-        }
-        else {
-            if (OS_ARCH != null && OS_ARCH.contains("64")) {
-                is64Bit = true;
-            }
-            else {
-                is64Bit = false;
-            }
-        }
-        JRE_IS_64BIT = is64Bit;
-    }
-
-    public static final boolean JRE_IS_MINIMUM_JAVA7 = JVM_MAJOR_VERSION > 1 || (JVM_MAJOR_VERSION == 1 && JVM_MINOR_VERSION >= 7);
-    public static final boolean JRE_IS_MINIMUM_JAVA8 = JVM_MAJOR_VERSION > 1 || (JVM_MAJOR_VERSION == 1 && JVM_MINOR_VERSION >= 8);
-    public static final boolean JRE_IS_MINIMUM_JAVA9 = JVM_MAJOR_VERSION > 1 || (JVM_MAJOR_VERSION == 1 && JVM_MINOR_VERSION >= 9);
-
-}
\ No newline at end of file