Enable -Wconversion: Passing-by: Remove dead code (MACOS_CONVERT).

MacOS (pre Mac OS X) is not supported anymore.

src/nvim/fileio.c

@@ -1235,7 +1235,6 @@ retry:
       if (size <= 0)
         break;
 
-
 # ifdef USE_ICONV
       if (iconv_fd != (iconv_t)-1) {
         /*
@@ -1294,16 +1293,6 @@ retry:
       }
 # endif
 
-# ifdef MACOS_CONVERT
-      if (fio_flags & FIO_MACROMAN) {
-        /*
-         * Conversion from Apple MacRoman char encoding to UTF-8 or
-         * latin1.  This is in os_mac_conv.c.
-         */
-        if (macroman2enc(ptr, &size, real_size) == FAIL)
-          goto rewind_retry;
-      } else
-# endif
       if (fio_flags != 0) {
         int u8c;
         char_u  *dest;
@@ -4029,38 +4018,6 @@ static int buf_write_bytes(struct bw_info *ip)
       }
     }
 
-
-# ifdef MACOS_CONVERT
-    else if (flags & FIO_MACROMAN) {
-      /*
-       * Convert UTF-8 or latin1 to Apple MacRoman.
-       */
-      char_u      *from;
-      size_t fromlen;
-
-      if (ip->bw_restlen > 0) {
-        /* Need to concatenate the remainder of the previous call and
-         * the bytes of the current call.  Use the end of the
-         * conversion buffer for this. */
-        fromlen = len + ip->bw_restlen;
-        from = ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
-        memmove(from, ip->bw_rest, (size_t)ip->bw_restlen);
-        memmove(from + ip->bw_restlen, buf, (size_t)len);
-      } else {
-        from = buf;
-        fromlen = len;
-      }
-
-      if (enc2macroman(from, fromlen,
-              ip->bw_conv_buf, &len, ip->bw_conv_buflen,
-              ip->bw_rest, &ip->bw_restlen) == FAIL) {
-        ip->bw_conv_error = TRUE;
-        return FAIL;
-      }
-      buf = ip->bw_conv_buf;
-    }
-# endif
-
 # ifdef USE_ICONV
     if (ip->bw_iconv_fd != (iconv_t)-1) {
       const char  *from;

src/nvim/mbyte.c

@@ -3931,28 +3931,6 @@ char_u * string_convert_ext(vimconv_T *vcp, char_u *ptr,
         *lenp = (size_t)(d - retval);
       break;
 
-# ifdef MACOS_CONVERT
-    case CONV_MAC_LATIN1:
-      retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
-          'm', 'l', unconvlenp);
-      break;
-
-    case CONV_LATIN1_MAC:
-      retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
-          'l', 'm', unconvlenp);
-      break;
-
-    case CONV_MAC_UTF8:
-      retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
-          'm', 'u', unconvlenp);
-      break;
-
-    case CONV_UTF8_MAC:
-      retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
-          'u', 'm', unconvlenp);
-      break;
-# endif
-
 # ifdef USE_ICONV
     case CONV_ICONV:              /* conversion with output_conv.vc_fd */
       retval = iconv_string(vcp, ptr, len, unconvlenp, lenp);

src/nvim/option.c

@@ -2059,12 +2059,6 @@ void set_init_1(void)
   /* Parse default for 'fillchars'. */
   (void)set_chars_option(&p_fcs);
 
-
-#  ifdef MACOS_CONVERT
-  /* Moved to os_mac_conv.c to avoid dependency problems. */
-  mac_lang_init();
-#  endif
-
   /* enc_locale() will try to find the encoding of the current locale. */
   p = enc_locale();
   if (p != NULL) {

src/nvim/os_unix.c

@@ -415,10 +415,6 @@ void mch_exit(int r)
   out_flush();
   ml_close_all(TRUE);           /* remove all memfiles */
 
-#ifdef MACOS_CONVERT
-  mac_conv_cleanup();
-#endif
-
   event_teardown();
 
 #ifdef EXITFREE

src/nvim/path.c

@@ -578,16 +578,6 @@ unix_expandpath (
           if (*path_end != NUL)
             backslash_halve(buf + len + 1);
           if (os_file_exists(buf)) {          /* add existing file */
-#ifdef MACOS_CONVERT
-            size_t precomp_len = STRLEN(buf)+1;
-            char_u *precomp_buf =
-              mac_precompose_path(buf, precomp_len, &precomp_len);
-
-            if (precomp_buf) {
-              memmove(buf, precomp_buf, precomp_len);
-              free(precomp_buf);
-            }
-#endif
             addfile(gap, buf, flags);
           }
         }

src/nvim/term.c

@@ -161,10 +161,6 @@ void term_init(void)
   setbuf(stdout, NULL);
 
   out_flush();
-
-#ifdef MACOS_CONVERT
-  mac_conv_init();
-#endif
 }
 
 /*