Revert "Use lenient configuration for prohibited dependencies check"

This reverts commit 602d4189d11a3cd59d07f77b81721731f191534e.

buildSrc/src/main/java/org/springframework/gradle/classpath/CheckClasspathForProhibitedDependencies.java

@@ -55,7 +55,7 @@ public class CheckClasspathForProhibitedDependencies extends DefaultTask {
 	@TaskAction
 	public void checkForProhibitedDependencies() throws IOException {
 		ResolvedConfiguration resolvedConfiguration = this.classpath.getResolvedConfiguration();
-		TreeSet<String> prohibited = resolvedConfiguration.getLenientConfiguration().getArtifacts().stream()
+		TreeSet<String> prohibited = resolvedConfiguration.getResolvedArtifacts().stream()
 				.map((artifact) -> artifact.getModuleVersion().getId()).filter(this::prohibited)
 				.map((id) -> id.getGroup() + ":" + id.getName()).collect(Collectors.toCollection(TreeSet::new));
 		if (!prohibited.isEmpty()) {