Remove some unused PEM structures

Reviewed-by: Emilia Käsper <emilia@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2797)

include/openssl/pem.h

@@ -54,56 +54,6 @@ extern "C" {
 # define PEM_TYPE_MIC_CLEAR      30
 # define PEM_TYPE_CLEAR          40
 
-typedef struct pem_recip_st {
-    char *name;
-    X509_NAME *dn;
-    int cipher;
-    int key_enc;
-    /*      char iv[8]; unused and wrong size */
-} PEM_USER;
-
-typedef struct pem_ctx_st {
-    int type;                   /* what type of object */
-    struct {
-        int version;
-        int mode;
-    } proc_type;
-
-    char *domain;
-
-    struct {
-        int cipher;
-        /*-
-        unused, and wrong size
-        unsigned char iv[8]; */
-    } DEK_info;
-
-    PEM_USER *originator;
-
-    int num_recipient;
-    PEM_USER **recipient;
-
-/*-
-    XXX(ben): don#t think this is used!
-        STACK *x509_chain;      / * certificate chain */
-    EVP_MD *md;                 /* signature type */
-
-    int md_enc;                 /* is the md encrypted or not? */
-    int md_len;                 /* length of md_data */
-    char *md_data;              /* message digest, could be pkey encrypted */
-
-    EVP_CIPHER *dec;            /* date encryption cipher */
-    int key_len;                /* key length */
-    unsigned char *key;         /* key */
-  /*-
-    unused, and wrong size
-    unsigned char iv[8]; */
-
-    int data_enc;               /* is the data encrypted */
-    int data_len;
-    unsigned char *data;
-} PEM_CTX;
-
 /*
  * These macros make the PEM_read/PEM_write functions easier to maintain and
  * write. Now they are all implemented with either: IMPLEMENT_PEM_rw(...) or

util/indent.pro

@@ -347,9 +347,7 @@
 -T PBEPARAM
 -T PBKDF2PARAM
 -T PCRYPTO_MEM_LEAK_CB
--T PEM_CTX
 -T PEM_ENCODE_SEAL_CTX
--T PEM_USER
 -T PHEAPENTRY32
 -T PHEAPLIST32
 -T PKCS12