core: Silence gcc -Wall compiler warnings

libostree/ostree-core.c

@@ -646,8 +646,7 @@ unpack_file (const char   *path,
   guint32 metadata_len;
   guint32 version, uid, gid, mode;
   guint64 content_len;
-  gsize bytes_read, bytes_written;
-  int temp_fd = -1;
+  gsize bytes_read;
 
   file = ot_util_new_file_for_path (path);
 

libostree/ostree-repo.c

@@ -936,7 +936,6 @@ ostree_repo_store_packfile (OstreeRepo       *self,
   gboolean ret = FALSE;
   GString *tempfile_path = NULL;
   GChecksum *checksum = NULL;
-  struct stat stbuf;
   gboolean did_exist;
 
   tempfile_path = g_string_new (priv->path);