Remove Webapp Build Hash (#22706)

* Remove Webapp Build Hash

A discrete webapp build hash is no longer needed with the mono-repo.

* i18n-extract

model/version.go

@@ -118,9 +118,6 @@ var BuildDate string
 var BuildHash string
 var BuildHashEnterprise string
 var BuildEnterpriseReady string
-var BuildHashBoards string
-var BuildBoards string
-var BuildHashPlaybooks string
 var versionsWithoutHotFixes []string
 
 func init() {