Remove deprecated finalName attribute

See gh-16202

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/RepackageMojo.java

@@ -86,13 +86,6 @@ public class RepackageMojo extends AbstractDependencyFilterMojo {
 	@Parameter(defaultValue = "${project.build.directory}", required = true)
 	private File outputDirectory;
 
-	/**
-	 * Name of the generated archive.
-	 * @since 1.0
-	 */
-	@Parameter(defaultValue = "${project.build.finalName}", readonly = true)
-	private String finalName;
-
 	/**
 	 * Skip the execution.
 	 * @since 1.2