Remove redundant public modifier

Author: wilkinsona

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/DevToolsDataSourceAutoConfiguration.java

@@ -64,7 +64,7 @@ static final class NonEmbeddedInMemoryDatabaseShutdownExecutor
 
 		private final DataSourceProperties dataSourceProperties;
 
-		public NonEmbeddedInMemoryDatabaseShutdownExecutor(DataSource dataSource,
+		NonEmbeddedInMemoryDatabaseShutdownExecutor(DataSource dataSource,
 				DataSourceProperties dataSourceProperties) {
 			this.dataSource = dataSource;
 			this.dataSourceProperties = dataSourceProperties;