drop deprecated oss-parent

Author: slandelle

pom.xml

@@ -1,10 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <parent>
-    <groupId>org.sonatype.oss</groupId>
-    <artifactId>oss-parent</artifactId>
-    <version>9</version>
-  </parent>
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.asynchttpclient</groupId>
   <artifactId>async-http-client-project</artifactId>