ref[cache]: use LazyCache instead of Caffeine

net/pom.xml

@@ -24,8 +24,6 @@
         <curator.version>5.5.0</curator.version>
         <!-- hardware detection -->
         <oshi.version>6.4.5</oshi.version>
-        <!-- cache -->
-        <caffeine.version>3.1.8</caffeine.version>
         <!-- Office document parsing -->
         <poi.version>5.2.3</poi.version>
         <csv.version>1.10.0</csv.version>
@@ -121,12 +119,6 @@
             </exclusions>
         </dependency>
 
-        <dependency>
-            <groupId>com.github.ben-manes.caffeine</groupId>
-            <artifactId>caffeine</artifactId>
-            <version>${caffeine.version}</version>
-        </dependency>
-
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>