Simplify POM, add more precise JPA annotations.

Change-Id: I2ad299c90d578c2151b2f0b0394d50d3dab3d24f
diff --git a/pom.xml b/pom.xml
index 543d422..3439701 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,9 +28,6 @@
     <resources-plugin.version>3.3.1</resources-plugin.version>
     <spotless-plugin.version>2.41.0</spotless-plugin.version>
 
-    <quarkus.platform.artifact-id>quarkus-universe-bom</quarkus.platform.artifact-id>
-    <quarkus.platform.group-id>io.quarkus</quarkus.platform.group-id>
-
     <basic-annotations.version>0.2.0</basic-annotations.version>
     <blaze-persistence.version>1.6.10</blaze-persistence.version>
     <findbugs-jsr305.version>3.0.2</findbugs-jsr305.version>
@@ -51,8 +48,8 @@
     <dependencies>
 
       <dependency>
-        <groupId>${quarkus.platform.group-id}</groupId>
-        <artifactId>${quarkus.platform.artifact-id}</artifactId>
+        <groupId>io.quarkus</groupId>
+        <artifactId>quarkus-universe-bom</artifactId>
         <version>${quarkus.version}</version>
         <type>pom</type>
         <scope>import</scope>