Remove unused method

Author: Kehrlann

config/src/main/java/org/springframework/security/config/annotation/authentication/configuration/InitializeAuthenticationProviderBeanManagerConfigurer.java

@@ -85,19 +85,6 @@ else if (authenticationProviders.size() > 1) {
 					authenticationProviderBeanName));
 		}
 
-		/**
-		 * @return a bean of the requested class if there's just a single registered
-		 * component, null otherwise.
-		 */
-		private <T> T getBeanOrNull(Class<T> type) {
-			String[] beanNames = InitializeAuthenticationProviderBeanManagerConfigurer.this.context
-				.getBeanNamesForType(type);
-			if (beanNames.length != 1) {
-				return null;
-			}
-			return InitializeAuthenticationProviderBeanManagerConfigurer.this.context.getBean(beanNames[0], type);
-		}
-
 		/**
 		 * @return a list of beans of the requested class, along with their names. If
 		 * there are no registered beans of that type, the list is empty.