diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/SignalUtils.java b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/SignalUtils.java
index 2e5f56700c..7ad79d6a4b 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/SignalUtils.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/SignalUtils.java
@@ -25,7 +25,6 @@ import sun.misc.Signal;
  * @since 1.1.0
  */
 @SuppressWarnings("restriction")
-@UsesUnsafeJava
 public final class SignalUtils {
 
 	private static final Signal SIG_INT = new Signal("INT");
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/UsesUnsafeJava.java b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/UsesUnsafeJava.java
deleted file mode 100644
index 656dce9c75..0000000000
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/UsesUnsafeJava.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright 2012-2017 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.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.boot.loader.tools;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-/**
- * Indicates that the annotated element uses unsafe Java calls.
- *
- * @author Phillip Webb
- */
-@Retention(RetentionPolicy.CLASS)
-@Target({ ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE })
-@Documented
-@interface UsesUnsafeJava {
-
-}
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/lang/UsesUnsafeJava.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/lang/UsesUnsafeJava.java
deleted file mode 100644
index 936baf453b..0000000000
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/lang/UsesUnsafeJava.java
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright 2012-2017 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.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.boot.lang;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-/**
- * Indicates that the annotated element uses unsafe Java calls.
- *
- * @author Phillip Webb
- * @since 1.3.0
- */
-@Retention(RetentionPolicy.CLASS)
-@Target({ ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE })
-@Documented
-public @interface UsesUnsafeJava {
-
-}
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/lang/package-info.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/lang/package-info.java
deleted file mode 100644
index 83349d70de..0000000000
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/lang/package-info.java
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright 2012-2017 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.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * Language feature annotations.
- */
-package org.springframework.boot.lang;