Remove jose hdr command

This command as exposed is insecure. It doesn't validate the protected
header. Nor is there any way to validate the protected header.

We will remove it for now. We can bring it back if it is needed.

Makefile.am

@@ -59,7 +59,6 @@ cmd_jose_SOURCES = \
     cmd/ver.c \
     cmd/enc.c \
     cmd/dec.c \
-    cmd/hdr.c \
     cmd/jose.c \
     cmd/jose.h
 

cmd/jose.c

@@ -223,7 +223,6 @@ main(int argc, char *argv[])
         { "ver", jcmd_ver },
         { "enc", jcmd_enc },
         { "dec", jcmd_dec },
-        { "hdr", jcmd_hdr },
         {}
     };
 
@@ -256,7 +255,6 @@ main(int argc, char *argv[])
 "\n  jose " VER_USE
 "\n  jose " ENC_USE
 "\n  jose " DEC_USE
-"\n  jose " HDR_USE
 "\n");
     return EXIT_FAILURE;
 }

cmd/jose.h

@@ -42,9 +42,6 @@
 #define DEC_USE \
     "dec -i JWE [-n] [-k JWK(Set) ...] [-o PLD]"
 
-#define HDR_USE \
-    "hdr -i JWE|JWS [-o HDR]"
-
 void *
 jcmd_load_data(const char *file, size_t *len);
 
@@ -85,6 +82,3 @@ jcmd_enc(int argc, char *argv[]);
 
 int
 jcmd_dec(int argc, char *argv[]);
-
-int
-jcmd_hdr(int argc, char *argv[]);