Update ehcache disk cache close() logic

Signed-off-by: Sagar Upadhyaya <sagar.upadhyaya.121@gmail.com>

plugins/cache-ehcache/src/main/java/org/opensearch/cache/store/disk/EhcacheDiskCache.java

@@ -463,23 +463,11 @@ public void refresh() {
     @Override
     @SuppressForbidden(reason = "Ehcache uses File.io")
     public void close() {
-        // We are calling each of below function in its own try/catch block so that we still try to close the cache
-        // manager in case removeCache failed (for example)
-        try {
-            cacheManager.removeCache(this.diskCacheAlias);
-        } catch (Exception e) {
-            logger.error(() -> new ParameterizedMessage("Exception occurred while trying to remove cache from manager"), e);
-        }
         try {
             cacheManager.close();
         } catch (Exception e) {
             logger.error(() -> new ParameterizedMessage("Exception occurred while trying to close ehcache manager"), e);
         }
-        try {
-            cacheManager.destroyCache(this.diskCacheAlias);
-        } catch (Exception e) {
-            logger.error(() -> new ParameterizedMessage("Exception occurred while trying to destroy cache and associated data"), e);
-        }
         // Delete all the disk cache related files/data in case it is present
         Path ehcacheDirectory = Paths.get(this.storagePath);
         if (Files.exists(ehcacheDirectory)) {
@@ -489,6 +477,7 @@ public void close() {
                 logger.error(() -> new ParameterizedMessage("Failed to delete ehcache disk cache data under path: {}", this.storagePath));
             }
         }
+
     }
 
     /**