diff --git a/pom.xml b/pom.xml
index 763ab86..52f4951 100644
--- a/pom.xml
+++ b/pom.xml
@@ -63,19 +63,6 @@
 			<artifactId>antlr4-runtime</artifactId>
 			<version>${antlr4.version}</version>
 		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>antlr4-maven-plugin</artifactId>
-			<version>${antlr4.version}</version>
-			<!-- <scope>provided</scope> -->
-			<exclusions>
-				<!-- incompatible with mock server -->
-				<exclusion>
-					<groupId>org.sonatype.sisu</groupId>
-					<artifactId>sisu-guava</artifactId>
-				</exclusion>
-			</exclusions>
-		</dependency>
 		<!-- adding manually due to Shell Command Injection and Directory Traversal
 		https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000487 
 		https://cwe.mitre.org/data/definitions/22.html --> 
diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/AnnisQueryProcessor.java b/src/main/java/de/ids_mannheim/korap/query/serialize/AnnisQueryProcessor.java
index 4ccf2a6..661a331 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/AnnisQueryProcessor.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/AnnisQueryProcessor.java
@@ -11,7 +11,6 @@
 import java.util.NoSuchElementException;
 import java.util.Set;
 
-import org.antlr.v4.parse.ANTLRParser.throwsSpec_return;
 import org.antlr.v4.runtime.ANTLRInputStream;
 import org.antlr.v4.runtime.BailErrorStrategy;
 import org.antlr.v4.runtime.CharStream;