remove superfluous data from POMs

spring-boot-admin-docs/pom.xml

@@ -7,7 +7,6 @@
         <version>1.3.4-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
-    <groupId>de.codecentric</groupId>
     <artifactId>spring-boot-admin-docs</artifactId>
     <packaging>pom</packaging>
     <name>Spring Boot Admin Docs</name>

spring-boot-admin-samples/pom.xml

@@ -8,7 +8,6 @@
         <version>1.3.4-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
-    <groupId>de.codecentric</groupId>
     <artifactId>spring-boot-admin-samples</artifactId>
     <packaging>pom</packaging>
     <name>Spring Boot Admin Samples</name>

spring-boot-admin-samples/spring-boot-admin-sample-war/pom.xml

 <?xml version="1.0"?>
 <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">
   <modelVersion>4.0.0</modelVersion>
-  <groupId>de.codecentric</groupId>
   <artifactId>spring-boot-admin-sample-war</artifactId>
-  <version>1.3.4-SNAPSHOT</version>
   <packaging>war</packaging>
   <parent>
     <groupId>de.codecentric</groupId>