Revert "BAEL-4134"

libraries-3/README.md

@@ -16,5 +16,4 @@ Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-m
 - [Introduction to Takes](https://www.baeldung.com/java-takes)
 - [Using NullAway to Avoid NullPointerExceptions](https://www.baeldung.com/java-nullaway)
 - [Introduction to Alibaba Arthas](https://www.baeldung.com/java-alibaba-arthas-intro)
-- [Quick Guide to Spring Cloud Circuit Breaker](https://www.baeldung.com/spring-cloud-circuit-breaker)
 - More articles [[<-- prev]](/libraries-2) [[next -->]](/libraries-4)

libraries-3/pom.xml

@@ -73,19 +73,19 @@
           <dependency>
             <groupId>com.uber.nullaway</groupId>
             <artifactId>nullaway</artifactId>
-            <version>0.3.0</version>
+            <version>${nullaway.version}</version>
         </dependency>
         <dependency>
             <groupId>org.codehaus.plexus</groupId>
             <artifactId>plexus-compiler-javac-errorprone</artifactId>
-            <version>2.8</version>
+            <version>${plexus-compiler.version}</version>
         </dependency>
         <!-- override plexus-compiler-javac-errorprone's dependency on
              Error Prone with the latest version -->
         <dependency>
             <groupId>com.google.errorprone</groupId>
             <artifactId>error_prone_core</artifactId>
-            <version>2.1.3</version>
+            <version>${errorprone.version}</version>
         </dependency>
     </dependencies>
 
@@ -230,5 +230,8 @@
         <httpclient.version>4.5.12</httpclient.version>
         <velocity-engine-core.version>2.2</velocity-engine-core.version>
         <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
+        <nullaway.version>0.3.0</nullaway.version>
+        <plexus-compiler.version>2.8</plexus-compiler.version>
+        <errorprone.version>2.1.3</errorprone.version>
     </properties>
 </project>