[CI] Updates download artifacts to remove dir before extracting

Author: picandocodigo

rake_tasks/elasticsearch_tasks.rake

@@ -55,7 +55,6 @@ namespace :elasticsearch do
     json_filename = CURRENT_PATH.join('tmp/artifacts.json')
 
     # Get version number and build hash of running cluster:
-    es_info = cluster_info
     version_number = cluster_info['number']
     build_hash = cluster_info['build_hash']
 
@@ -74,6 +73,9 @@ namespace :elasticsearch do
     filename = CURRENT_PATH.join("tmp/#{zip_url.split('/').last}")
     download_file!(zip_url, filename)
 
+    spec = CURRENT_PATH.join('tmp/rest-api-spec')
+    FileUtils.remove_dir(spec) if File.directory?(spec)
+
     puts "Unzipping file #{filename}"
     `unzip -o #{filename} -d tmp/`
     `rm #{filename}`