POM: Remove unused Guava dependency.
diff --git a/jgvariant-parent/pom.xml b/jgvariant-parent/pom.xml
index cdb41be..364746f 100644
--- a/jgvariant-parent/pom.xml
+++ b/jgvariant-parent/pom.xml
@@ -73,7 +73,6 @@
 
     <apiguardian.version>1.1.2</apiguardian.version>
     <errorprone.version>2.23.0</errorprone.version>
-    <guava.version>32.1.3-jre</guava.version>
     <inject-resources.version>0.3.3</inject-resources.version>
     <jetbrains-annotations.version>24.1.0</jetbrains-annotations.version>
     <jqwik.version>1.8.2</jqwik.version>
@@ -137,13 +136,6 @@
         <version>${parsson.version}</version>
       </dependency>
 
-      <!-- Guava -->
-      <dependency>
-        <groupId>com.google.guava</groupId>
-        <artifactId>guava</artifactId>
-        <version>${guava.version}</version>
-      </dependency>
-
       <!-- Testing -->
       <dependency>
         <groupId>org.junit.jupiter</groupId>