Remove i386 from websphere-liberty

It's been failing for a while during `populate_scc.sh`.

library/websphere-liberty

@@ -3,7 +3,7 @@ Maintainers: Chris Potter <[email protected]> (@crpotter),
              Arthur De Magalhaes <[email protected]> (@arthurdm)
 GitRepo: https://github.com/WASdev/ci.docker.git
 GitCommit: fcfbbebb844944acf6e0b6064256324335732e03
-Architectures: amd64, i386, ppc64le, s390x
+Architectures: amd64, ppc64le, s390x
 
 Tags: kernel
 Directory: ga/latest/kernel