Update requirements.md

Removed reference of beta for parallel feature

Author: shcorbett

docs/requirements.md

@@ -8,7 +8,7 @@ storage and must have network connectivity with the GitHub Enterprise Server app
 Backup host software requirements are modest: Linux or other modern Unix operating
 system with [bash][1], [git][2], [OpenSSH][3] 5.6 or newer, and [rsync][4] v2.6.4 or newer.
 
-The new parallel backup and restore beta feature will require [GNU awk][10] and [moreutils][9] to be installed.
+The parallel backup and restore feature will require [GNU awk][10] and [moreutils][9] to be installed.
 
 We encourage the use of [Docker](docker.md) if your backup host doesn't meet these
 requirements, or if Docker is your preferred platform.