remove unnecessary fields

hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/http/HttpUtils.java

@@ -39,8 +39,6 @@ import java.util.Map;
 @Slf4j
 public class HttpUtils {
 
-    private static final String CONTENT_TYPE = "application/json";
-
     private static final int CONNECT_TIMEOUT = 10000;
 
     private static final int READ_TIMEOUT = 300000;

hippo4j-server/src/main/resources/application.properties

@@ -37,7 +37,7 @@ hippo4j.database.init_script=sql-script/mysql/hippo4j_manager.sql
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 spring.datasource.url=jdbc:mysql://localhost:3306/hippo4j_manager?characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&serverTimezone=GMT%2B8
 spring.datasource.username=root
-spring.datasource.password=2559205
+spring.datasource.password=root
 
 ### Hikari Datasource
 spring.datasource.hikari.pool-name=Hikari