gradle: remove nonStrictJavadocProjects

This become obsolete with 1a3067c89 ("Enable werror for javadoc and
fix javadoc issues"), which enabled 'werror' for javadoc on all
projects.

build.gradle

@@ -101,20 +101,6 @@ allprojects {
 			':smack-omemo-signal-integration-test',
 			':smack-repl'
 		].collect{ project(it) }
-		// When this list is empty, then move the according javadoc
-		// tool Werror option into the global configure section.
-		nonStrictJavadocProjects = [
-			':smack-bosh',
-			':smack-core',
-			':smack-experimental',
-			':smack-extensions',
-			':smack-im',
-			':smack-integration-test',
-			':smack-jingle-old',
-			':smack-legacy',
-			':smack-omemo',
-			':smack-tcp',
-		].collect{ project(it) }
 		// Lazily evaluate the Android bootClasspath and offline
 		// Javadoc using a closure, so that targets which do not
 		// require it are still able to succeed without an Android
@@ -571,15 +557,6 @@ subprojects*.jar {
    }
 }
 
-configure(subprojects - nonStrictJavadocProjects) {
-	tasks.withType(Javadoc) {
-		// Abort on javadoc warnings.
-		// See JDK-8200363 (https://bugs.openjdk.java.net/browse/JDK-8200363)
-		// for information about the -Xwerror option.
-		options.addStringOption('Xwerror', '-quiet')
-	}
-}
-
 configure(subprojects - gplLicensedProjects) {
 	checkstyle {
 		configProperties.checkstyleLicenseHeader = "header"