Remove method from package private class

- This change is binary compatible since the class is package-private
- Removed
org.apache.commons.dbcp2.datasources.CPDSConnectionFactory.setMaxConnLifetimeMillis(long)

src/main/java/org/apache/commons/dbcp2/datasources/CPDSConnectionFactory.java

@@ -297,19 +297,6 @@ public void setMaxConnLifetime(final Duration maxConnDuration) {
         this.maxConnDuration = maxConnDuration;
     }
 
-    /**
-     * Sets the maximum lifetime in milliseconds of a connection after which the connection will always fail activation,
-     * passivation and validation.
-     *
-     * @param maxConnLifetimeMillis
-     *            A value of zero or less indicates an infinite lifetime. The default value is -1.
-     * @deprecated Use {@link #setMaxConn(Duration)}.
-     */
-    @Deprecated
-    public void setMaxConnLifetimeMillis(final long maxConnLifetimeMillis) {
-        setMaxConnLifetime(Duration.ofMillis(maxConnLifetimeMillis));
-    }
-
     /**
      * Sets the database password used when creating new connections.
      *