cli: remove enum names from typedefs

There are some enum typedefs with the enum name:

    typedef enum _name_t { ... } name_t;

We don't need or use the enum names _name_t for anything, and not all
of the enum typedefs have them. We have the typedefs specifically to
use the typedef name.

Use the anonymous enum in the typedefs:

    typedef enum { ... } name_t;

notmuch-client.h

@@ -426,13 +426,13 @@ mime_node_seek_dfs (mime_node_t *node, int n);
 const _notmuch_message_crypto_t *
 mime_node_get_message_crypto_status (mime_node_t *node);
 
-typedef enum dump_formats {
+typedef enum {
     DUMP_FORMAT_AUTO,
     DUMP_FORMAT_BATCH_TAG,
     DUMP_FORMAT_SUP
 } dump_format_t;
 
-typedef enum dump_includes {
+typedef enum {
     DUMP_INCLUDE_TAGS		= 1,
     DUMP_INCLUDE_CONFIG		= 2,
     DUMP_INCLUDE_PROPERTIES	= 4

util/hex-escape.h

@@ -5,7 +5,7 @@
 extern "C" {
 #endif
 
-typedef enum hex_status {
+typedef enum {
     HEX_SUCCESS = 0,
     HEX_SYNTAX_ERROR,
     HEX_OUT_OF_MEMORY