Remove no-op version changes

The versions in the parent are the same.

pom.xml

@@ -44,8 +44,6 @@
 		<jackson.version>2.16.1</jackson.version>
 		<avro.version>1.11.3</avro.version>
 		<org.slf4j.version>2.0.12</org.slf4j.version>
-		<maven-source-plugin.version>3.3.0</maven-source-plugin.version>
-		<maven-gpg-plugin.version>3.1.0</maven-gpg-plugin.version>
 		<!-- Build configurations -->
 		<maven.compiler.release>17</maven.compiler.release>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -115,6 +113,7 @@
 
 		<!-- JSON & JSON Schema related -->
 		<dependency>
+			<!-- Necessary because Avro also has a dependency on Jackson -->
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-core</artifactId>
 			<version>${jackson.version}</version>