pem.c: always compile pem.c independently of crypto backend

src/pem.c

@@ -38,8 +38,6 @@
 
 #include "libssh2_priv.h"
 
-#ifdef LIBSSH2_LIBGCRYPT /* compile only if we build with libgcrypt */
-
 static int
 readline(char *line, int line_size, FILE * fp)
 {
@@ -209,5 +207,3 @@ _libssh2_pem_decode_integer(unsigned char **data, unsigned int *datalen,
 
     return 0;
 }
-
-#endif /* LIBSSH2_LIBGCRYPT */