zstd on ubuntu 18.04 is too old

Summary: Ubuntu 18.04 zstd version is too old for the folly buikld

Reviewed By: Croohand

Differential Revision: D32693530

fbshipit-source-id: 9de4b8d1eac1043b329016e487241e27bf6bb554

Author: ahornby

build/fbcode_builder/manifests/zstd

@@ -5,9 +5,6 @@ name = zstd
 libzstd-devel
 libzstd
 
-[debs]
-libzstd-dev
-
 [download]
 url = https://github.com/facebook/zstd/releases/download/v1.4.5/zstd-1.4.5.tar.gz
 sha256 = 98e91c7c6bf162bf90e4e70fdbc41a8188b9fa8de5ad840c401198014406ce9e