Remove Kotlin field handling in DependencyDescriptor

The KotlinDelegate#isNullable invocation is unnecessary since this check
is already done by the Nullness#forField one introduced by
b5d153f.

See gh-34952
See gh-34261

Author: sdeleuze

spring-beans/src/main/java/org/springframework/beans/factory/config/DependencyDescriptor.java

@@ -24,15 +24,12 @@
 import java.util.Map;
 import java.util.Optional;
 
-import kotlin.reflect.KProperty;
-import kotlin.reflect.jvm.ReflectJvmMapping;
 import org.jspecify.annotations.Nullable;
 
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.InjectionPoint;
 import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
-import org.springframework.core.KotlinDetector;
 import org.springframework.core.MethodParameter;
 import org.springframework.core.Nullness;
 import org.springframework.core.ParameterNameDiscoverer;
@@ -163,8 +160,7 @@ public boolean isRequired() {
 		}
 
 		if (this.field != null) {
-			return !(this.field.getType() == Optional.class || Nullness.forField(this.field) == Nullness.NULLABLE ||
-					(KotlinDetector.isKotlinType(this.field.getDeclaringClass()) && KotlinDelegate.isNullable(this.field)));
+			return !(this.field.getType() == Optional.class || Nullness.forField(this.field) == Nullness.NULLABLE);
 		}
 		else {
 			return !obtainMethodParameter().isOptional();
@@ -446,19 +442,4 @@ private void readObject(ObjectInputStream ois) throws IOException, ClassNotFound
 		}
 	}
 
-
-	/**
-	 * Inner class to avoid a hard dependency on Kotlin at runtime.
-	 */
-	private static class KotlinDelegate {
-
-		/**
-		 * Check whether the specified {@link Field} represents a nullable Kotlin type or not.
-		 */
-		public static boolean isNullable(Field field) {
-			KProperty<?> property = ReflectJvmMapping.getKotlinProperty(field);
-			return (property != null && property.getReturnType().isMarkedNullable());
-		}
-	}
-
 }