Remove some dead code

The assignment to ret is dead, because ret is assigned again later.
Reviewed-by: NTim Hudson <tjh@openssl.org>

crypto/bio/bf_buff.c

@@ -365,7 +365,6 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr)
             } else {
                 ctx->obuf_len = 0;
                 ctx->obuf_off = 0;
-                ret = 1;
                 break;
             }
         }

crypto/bio/bf_lbuf.c

@@ -270,7 +270,6 @@ static long linebuffer_ctrl(BIO *b, int cmd, long num, void *ptr)
                 ctx->obuf_len -= r;
             } else {
                 ctx->obuf_len = 0;
-                ret = 1;
                 break;
             }
         }