Polishing Java 24 compilation setup

See gh-1206

Author: bclozel

.sdkmanrc

@@ -1,3 +1,3 @@
 # Enable auto-env through the sdkman_auto_env config
 # Add key=value pairs of SDKs to use below
-java=17.0.15-librca
+java=24.0.1-librca

build.gradle

@@ -45,12 +45,6 @@ configure(moduleProjects) {
 	apply plugin: 'java-library'
 	apply plugin: 'java-test-fixtures'
 
-	java {
-		toolchain {
-			languageVersion = JavaLanguageVersion.of(17)
-		}
-	}
-
 	configurations {
 		dependencyManagement {
 			canBeConsumed = false