Remove unneeded conditional logic

Update `ConversionUtils` to remove conditional logic that isn't
necessary.

Issue: SPR-16968

spring-core/src/main/java/org/springframework/core/convert/support/ConversionUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,15 +62,13 @@ abstract class ConversionUtils {
 			// yes
 			return true;
 		}
-		else if (sourceElementType.getType().isAssignableFrom(targetElementType.getType())) {
+		if (sourceElementType.getType().isAssignableFrom(targetElementType.getType())) {
 			// maybe
 			return true;
 		}
-		else {
 		// no
 		return false;
 	}
-	}
 
 	public static Class<?> getEnumType(Class<?> targetType) {
 		Class<?> enumType = targetType;