Remove Amiga remnants

Notes regarding the removal of specific items:

  - Aztec C: only on the Amiga.
  - mch_check_win(): doesn't exist anymore.
  - Comment in ex_cmds.c: It seems the context for this comment was
    removed, but the comment was inadvertantly left alone.

src/nvim/ex_cmds.c

@@ -1294,14 +1294,6 @@ do_shell (
     }
 
     starttermcap();             /* start termcap if not done by wait_return() */
-
-    /*
-     * In an Amiga window redrawing is caused by asking the window size.
-     * If we got an interrupt this will not work. The chance that the
-     * window size is wrong is very small, but we need to redraw the
-     * screen.  Don't do this if ':' hit in wait_return().	THIS IS UGLY
-     * but it saves an extra redraw.
-     */
   }
 
   /* display any error messages now */

src/nvim/ex_docmd.c

@@ -5141,8 +5141,7 @@ static void ex_quit(exarg_T *eap)
  */
 static void ex_cquit(exarg_T *eap)
 {
-  getout(1);    /* this does not always pass on the exit code to the Manx
-                   compiler. why? */
+  getout(1);
 }
 
 /*

src/nvim/main.c

@@ -208,9 +208,6 @@ int main(int argc, char **argv)
 
   /*
    * Check if we have an interactive window.
-   * On the Amiga: If there is no window, we open one with a newcli command
-   * (needed for :! to * work). mch_check_win() will also handle the -d or
-   * -dev argument.
    */
   check_and_set_isatty(&params);
 
@@ -1087,8 +1084,7 @@ static void command_line_scan(mparm_T *parmp)
           exmode_active = EXMODE_VIM;
           break;
 
-        case 'f':                 /* "-f"  GUI: run in foreground.  Amiga: open
-                                     window directly, not with newcli */
+        case 'f':                 /* "-f"  GUI: run in foreground. */
           break;
 
         case 'g':                 /* "-g" start GUI */
@@ -1489,9 +1485,6 @@ static void init_startuptime(mparm_T *paramp)
 
 /*
  * Check if we have an interactive window.
- * On the Amiga: If there is no window, we open one with a newcli command
- * (needed for :! to * work). mch_check_win() will also handle the -d or
- * -dev argument.
  */
 static void check_and_set_isatty(mparm_T *paramp)
 {
@@ -1957,10 +1950,10 @@ static void source_startup_scripts(mparm_T *parmp)
     /*
      * Try to read initialization commands from the following places:
      * - environment variable VIMINIT
-     * - user vimrc file (s:.vimrc for Amiga, ~/.vimrc otherwise)
+     * - user vimrc file (~/.vimrc)
      * - second user vimrc file ($VIM/.vimrc for Dos)
      * - environment variable EXINIT
-     * - user exrc file (s:.exrc for Amiga, ~/.exrc otherwise)
+     * - user exrc file (~/.exrc)
      * - second user exrc file ($VIM/.exrc for Dos)
      * The first that exists is used, the rest is ignored.
      */

src/nvim/path.c

@@ -179,7 +179,7 @@ char_u *path_next_component(char_u *fname)
 
 /*
  * Get a pointer to one character past the head of a path name.
- * Unix: after "/"; DOS: after "c:\"; Amiga: after "disk:/"; Mac: no head.
+ * Unix: after "/"; DOS: after "c:\"; Mac: no head.
  * If there is no head, path is returned.
  */
 char_u *get_past_head(char_u *path)

src/nvim/term.c

@@ -80,7 +80,7 @@
  *
  * The entries are compact, therefore they normally are included even when
  * HAVE_TGETENT is defined. When HAVE_TGETENT is defined, the builtin entries
- * can be accessed with "builtin_amiga", "builtin_ansi", "builtin_debug", etc.
+ * can be accessed with "builtin_ansi", "builtin_debug", etc.
  *
  * Each termcap is a list of builtin_term structures. It always starts with
  * KS_NAME, which separates the entries.  See parse_builtin_tcap() for all

src/nvim/testdir/test17.in

@@ -16,11 +16,7 @@ STARTTEST
 :let $CDIR = "."
 /CDIR
 :else
-:if has("amiga")
-:let $TDIR = "/testdir"
-:else
 :let $TDIR = "."
-:endif
 /TDIR
 :endif
 :" Dummy writing for making that sure gf doesn't fail even if the current