Remove unsupported "arm32v7" Architectures entry from "fedora:rawhide"

See https://github.com/docker-library/official-images/pull/4816/files#r220669075

library/fedora

@@ -23,7 +23,7 @@ arm64v8-Directory: aarch64/
 ppc64le-Directory: ppc64le/
 
 Tags: rawhide
-Architectures: amd64, arm32v7, arm64v8, ppc64le
+Architectures: amd64, arm64v8, ppc64le
 GitFetch: refs/heads/rawhide
 GitCommit: 3638c329a8590f71b2922b24494f66b6c932d8d2
 amd64-Directory: x86_64/