[ostree] deltas: Remove support for gzipped delta parts

[Colin Walters <walters src gnome org>]

commit 3c2a36eab0494556bbbe98dee8687583bbcb89c3
Author: Colin Walters <walters verbum org>
Date:   Wed Jan 28 17:24:11 2015 -0500

    deltas: Remove support for gzipped delta parts
    
    XZ is really, really good.

 src/libostree/ostree-repo-static-delta-private.h   |    2 +-
 .../ostree-repo-static-delta-processing.c          |   10 ----------
 2 files changed, 1 insertions(+), 11 deletions(-)
---
diff --git a/src/libostree/ostree-repo-static-delta-private.h 
b/src/libostree/ostree-repo-static-delta-private.h
index f321522..6377f53 100644
--- a/src/libostree/ostree-repo-static-delta-private.h
+++ b/src/libostree/ostree-repo-static-delta-private.h
@@ -32,7 +32,7 @@ G_BEGIN_DECLS
 /**
  * OSTREE_STATIC_DELTA_PART_PAYLOAD_FORMAT:
  *
- *   y  compression type (0: none, 'z': zlib)
+ *   y  compression type (0: none, 'x': lzma)
  *   ---
  *   ay data source
  *   ay operations
diff --git a/src/libostree/ostree-repo-static-delta-processing.c 
b/src/libostree/ostree-repo-static-delta-processing.c
index adf36e5..03b3735 100644
--- a/src/libostree/ostree-repo-static-delta-processing.c
+++ b/src/libostree/ostree-repo-static-delta-processing.c
@@ -318,16 +318,6 @@ _ostree_static_delta_part_execute (OstreeRepo      *repo,
       /* No compression */
       payload_data = g_bytes_ref (part_payload_bytes);
       break;
-    case 'g':
-      {
-        gs_unref_object GConverter *decomp =
-          (GConverter*) g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_RAW);
-
-        if (!decompress_all (decomp, part_payload_bytes, &payload_data,
-                             cancellable, error))
-          goto out;
-      }
-      break;
     case 'x':
       {
         gs_unref_object GConverter *decomp =