chore(deps): drop unused commons-compress and zstd-jni

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dfa1

core/pom.xml

@@ -20,14 +20,6 @@
 			<groupId>com.google.protobuf</groupId>
 			<artifactId>protobuf-java</artifactId>
 		</dependency>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>commons-compress</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>com.github.luben</groupId>
-			<artifactId>zstd-jni</artifactId>
-		</dependency>
 		<dependency>
 			<groupId>org.junit.jupiter</groupId>
 			<artifactId>junit-jupiter</artifactId>

pom.xml

@@ -54,18 +54,6 @@
 				<artifactId>protobuf-java</artifactId>
 				<version>${protobuf.version}</version>
 			</dependency>
-			<!-- pure-Java LZ4 -->
-			<dependency>
-				<groupId>org.apache.commons</groupId>
-				<artifactId>commons-compress</artifactId>
-				<version>1.27.1</version>
-			</dependency>
-			<!-- Zstd: JNI-based; only option for performance -->
-			<dependency>
-				<groupId>com.github.luben</groupId>
-				<artifactId>zstd-jni</artifactId>
-				<version>1.5.6-9</version>
-			</dependency>
 			<dependency>
 				<groupId>org.junit.jupiter</groupId>
 				<artifactId>junit-jupiter</artifactId>