remove command of xz

Signed-off-by: muthuja <muthujabavaji.vempalli@progress.com>

Author: muthuja

lib/omnibus/fetchers/net_fetcher.rb

@@ -163,7 +163,6 @@ def execute_tests(file_path)
   log.info(log_key) { "-----DEBUG-----checking gtar and xz versions and path" }
   shellout!("gtar --version")
   shellout!("which gtar")
-  shellout!("brew install xz")
   shellout!("xz --version")
   shellout!("which xz")
   log.info(log_key) { "-----DEBUG-----end of the test to here" }