Revert "MM-41211: Adds ability to set SessionLengthSSOInDays to a decimal. (#19396)" (#19563)

This reverts commit 7398451030.

api4/user.go

@@ -2080,7 +2080,7 @@ func attachDeviceId(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	c.App.ClearSessionCacheForUser(c.AppContext.Session().UserId)
-	c.App.SetSessionExpireInHours(c.AppContext.Session(), *c.App.Config().ServiceSettings.SessionLengthMobileInHours())
+	c.App.SetSessionExpireInDays(c.AppContext.Session(), *c.App.Config().ServiceSettings.SessionLengthMobileInDays)
 
 	maxAge := *c.App.Config().ServiceSettings.SessionLengthMobileInDays * 60 * 60 * 24