HADOOP-18761. Remove mysql-connector-java (#5731)

(cherry picked from commit e1bb4acd3686720da1a50676400f080cc9403922)

hadoop-hdfs-project/hadoop-hdfs-rbf/pom.xml

@@ -97,11 +97,6 @@ https://maven.apache.org/xsd/maven-4.0.0.xsd">
       <groupId>com.zaxxer</groupId>
       <artifactId>HikariCP-java7</artifactId>
     </dependency>
-    <dependency>
-      <groupId>mysql</groupId>
-      <artifactId>mysql-connector-java</artifactId>
-      <scope>provided</scope>
-    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/security/token/SQLConnectionFactory.java

@@ -18,7 +18,6 @@
 
 package org.apache.hadoop.hdfs.server.federation.router.security.token;
 
-import com.mysql.cj.jdbc.MysqlDataSource;
 import com.zaxxer.hikari.HikariConfig;
 import com.zaxxer.hikari.HikariDataSource;
 import java.sql.Connection;

hadoop-project/pom.xml

@@ -134,7 +134,6 @@
     <ehcache.version>3.3.1</ehcache.version>
     <hikari.version>2.4.12</hikari.version>
     <derby.version>10.14.2.0</derby.version>
-    <mysql-connector-java.version>8.0.29</mysql-connector-java.version>
     <mssql.version>6.2.1.jre7</mssql.version>
     <okhttp3.version>4.9.3</okhttp3.version>
     <kotlin-stdlib.verion>1.4.10</kotlin-stdlib.verion>
@@ -1868,11 +1867,6 @@
           <artifactId>derby</artifactId>
           <version>${derby.version}</version>
         </dependency>
-        <dependency>
-          <groupId>mysql</groupId>
-          <artifactId>mysql-connector-java</artifactId>
-          <version>${mysql-connector-java.version}</version>
-        </dependency>
         <dependency>
           <groupId>com.microsoft.sqlserver</groupId>
           <artifactId>mssql-jdbc</artifactId>