[refact][offline] Remove duplicate method to obtain temporary directory

Author: Clément Le Provost

algoliasearch/src/offline/java/com/algolia/search/saas/OfflineClient.java

@@ -187,10 +187,6 @@ public OfflineIndex getOfflineIndex(@NonNull String indexName) {
         return rootDataDir;
     }
 
-    protected File getTemporaryDirectory() {
-        return context.getCacheDir();
-    }
-
     /**
      * Get the path to the temporary directory used by this client.
      *

algoliasearch/src/offline/java/com/algolia/search/saas/OfflineIndex.java

@@ -1060,7 +1060,7 @@ private File writeTmpJSONFile(@NonNull Collection<JSONObject> objects) throws Al
     private File writeTempFile(@NonNull String data) throws AlgoliaException {
         try {
             // Create temporary file.
-            File tmpDir = client.getTemporaryDirectory();
+            File tmpDir = client.getTempDir();
             File tmpFile = File.createTempFile("algolia.", ".json", tmpDir);
 
             // Write to file.