Drop rewrite-java-17 now that tests use Java 21

Author: timtebeek

build.gradle.kts

@@ -19,7 +19,6 @@ dependencies {
     implementation(platform("org.openrewrite:rewrite-bom:${rewriteVersion}"))
 
     implementation("org.openrewrite:rewrite-java")
-    runtimeOnly("org.openrewrite:rewrite-java-17")
     runtimeOnly("org.openrewrite:rewrite-java-21")
     // Need to have a slf4j binding to see any output enabled from the parser.
     runtimeOnly("ch.qos.logback:logback-classic:1.2.+")