Gradle: Remove the Javadoc task

It does not play well with Multiplatform and Android plugins applied.
Going forward, dokka will be used. Currently, it doesn't support
Javadoc in multiplatform projects either

kase64/build.gradle.kts

@@ -34,17 +34,13 @@ kotlin {
     }
 }
 
-java {
-    toolchain {
-        languageVersion.set(JavaLanguageVersion.of(17))
-    }
-}
+java.toolchain.languageVersion.set(JavaLanguageVersion.of(17))
 
 android {
-    compileSdk = 33
     namespace = "saschpe.kase64"
 
     defaultConfig {
+        compileSdk = 33
         minSdk = 17
     }
 
@@ -54,14 +50,8 @@ android {
 group = "de.peilicke.sascha"
 version = "1.0.7"
 
-val javadocJar by tasks.registering(Jar::class) {
-    archiveClassifier.set("javadoc")
-}
-
 publishing {
     publications.withType<MavenPublication> {
-        artifact(javadocJar.get())
-
         pom {
             name.set("Kase64")
             description.set("Base64 encoder/decoder for Kotlin/Multiplatform. Supports Android, iOS, JavaScript and plain JVM environments.")