Linode sponsorship expired

Thanks for the support. Hopefully we'll see Linode/Akamai
back as an OSS sponsor again in the future.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Author: alexellis

_data/sponsors.yml

@@ -4,11 +4,6 @@
 # Want to be the first and only diamond sponsor?
 # diamond:
 
-platinum:
-
-# Expires Apr 24
-- alt: "Linode by Akamai"
-  url: https://www.linode.com/openfaas?utm_source=openfaas&utm_medium=web&utm_campaign=sponsorship
-  logo: akamai.svg
+# platinum:
 
 # gold: