Drop defensive Joda-Time 2.x check

spring-context/src/main/java/org/springframework/format/datetime/joda/JodaTimeFormatterRegistrar.java

@@ -38,7 +38,6 @@ import org.springframework.format.FormatterRegistry;
 import org.springframework.format.Parser;
 import org.springframework.format.Printer;
 import org.springframework.format.annotation.DateTimeFormat.ISO;
-import org.springframework.util.ClassUtils;
 
 /**
  * Configures Joda-Time's formatting system for use with Spring.
@@ -62,14 +61,6 @@ public class JodaTimeFormatterRegistrar implements FormatterRegistrar {
 	private enum Type {DATE, TIME, DATE_TIME}
 
 
-	/**
-	 * Strictly speaking, this should not be necessary since we formally require JodaTime 2.x.
-	 * However, since Joda-Time formatters are being registered automatically, we defensively
-	 * adapt to Joda-Time 1.x when encountered on the classpath. To be removed in Spring 5.0.
-	 */
-	private static final boolean jodaTime2Available = ClassUtils.isPresent(
-			"org.joda.time.YearMonth", JodaTimeFormatterRegistrar.class.getClassLoader());
-
 	/**
 	 * User defined formatters.
 	 */
@@ -209,9 +200,8 @@ public class JodaTimeFormatterRegistrar implements FormatterRegistrar {
 
 		registry.addFormatterForFieldType(Period.class, new PeriodFormatter());
 		registry.addFormatterForFieldType(Duration.class, new DurationFormatter());
-		if (jodaTime2Available) {
+		registry.addFormatterForFieldType(YearMonth.class, new YearMonthFormatter());
-			JodaTime2Delegate.registerAdditionalFormatters(registry);
+		registry.addFormatterForFieldType(MonthDay.class, new MonthDayFormatter());
-		}
 
 		registry.addFormatterForFieldAnnotation(new JodaDateTimeFormatAnnotationFormatterFactory());
 	}
@@ -241,16 +231,4 @@ public class JodaTimeFormatterRegistrar implements FormatterRegistrar {
 		}
 	}
 
-
-	/**
-	 * Inner class to avoid a hard dependency on Joda-Time 2.x.
-	 */
-	private static class JodaTime2Delegate {
-
-		public static void registerAdditionalFormatters(FormatterRegistry registry) {
-			registry.addFormatterForFieldType(YearMonth.class, new YearMonthFormatter());
-			registry.addFormatterForFieldType(MonthDay.class, new MonthDayFormatter());
-		}
-	}
-
 }