Remove isExtensionPoint check in AbstractExtensionFinder so a Service from a ServiceProvider is seen as an extension point

pf4j/src/main/java/ro/fortsoft/pf4j/AbstractExtensionFinder.java

@@ -45,13 +45,6 @@ public abstract class AbstractExtensionFinder implements ExtensionFinder, Plugin
 
     @Override
 	public <T> List<ExtensionWrapper<T>> find(Class<T> type) {
-        log.debug("Checking extension point '{}'", type.getName());
-        if (!isExtensionPoint(type)) {
-            log.warn("'{}' is not an extension point", type.getName());
-
-            return Collections.emptyList(); // or return null ?!
-        }
-
 		log.debug("Finding extensions for extension point '{}'", type.getName());
         Map<String, Set<String>> entries = getEntries();
 
@@ -133,10 +126,6 @@ public abstract class AbstractExtensionFinder implements ExtensionFinder, Plugin
         return result;
     }
 
-    private boolean isExtensionPoint(Class<?> type) {
-        return ExtensionPoint.class.isAssignableFrom(type);
-    }
-
     private Map<String, Set<String>> getEntries() {
         if (entries == null) {
             entries = readStorages();