Avoid Gradle deprecation warnings from failing the build

Cause: asciidoctor/asciidoctor-gradle-plugin#751

Author: marcphilipp

gradle.properties

@@ -16,7 +16,6 @@ org.gradle.parallel=true
 org.gradle.configuration-cache.parallel=true
 org.gradle.java.installations.fromEnv=JDK8,JDK18,JDK19,JDK20,JDK21,JDK22,JDK23,JDK24
 org.gradle.kotlin.dsl.allWarningsAsErrors=true
-org.gradle.warning.mode=fail
 
 # Test Distribution
 develocity.internal.testdistribution.writeTraceFile=true