Removed unused dependency on junit until we add unit tests, and changed groupId to match the other nayuki project already on maven central

java/pom.xml

@@ -2,7 +2,7 @@
   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>io.nayuki</groupId>
+  <groupId>com.github.nayuki</groupId>
   <artifactId>qrcodegen</artifactId>
   <version>1.0.0</version>
   <packaging>jar</packaging>
@@ -48,15 +48,6 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
-  <dependencies>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>3.8.1</version>
-      <scope>test</scope>
-    </dependency>
-  </dependencies>
-
   <build>
     <plugins>
       <plugin>