Remove disabled tasks from docs

- i.e. disabling jar will make local publish fail
- Relates #1132

spring-shell-docs/spring-shell-docs.gradle

@@ -15,22 +15,6 @@ dependencies {
 	testImplementation 'org.awaitility:awaitility'
 }
 
-jar {
-	enabled = false
-}
-
-javadoc {
-	enabled = false
-}
-
-javadocJar {
-	enabled = false
-}
-
-sourcesJar {
-	enabled = false
-}
-
 antora {
 	version = '3.2.0-alpha.6'
 	if (project.hasProperty('antoraLocalBarePlaybook') && antoraLocalBarePlaybook.toBoolean()) {