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js: Remove support for creating the status bar in JavaScript

Now we depend on its being in the HTML.

--- a/emcc.c

+++ b/emcc.c

@@ -79,7 +79,6 @@

 extern void js_canvas_free_blitter(int id);

 extern void js_canvas_copy_to_blitter(int id, int x, int y, int w, int h);

 extern void js_canvas_copy_from_blitter(int id, int x, int y, int w, int h);

-extern void js_canvas_make_statusbar(void);

 extern void js_canvas_remove_statusbar(void);

 extern void js_canvas_set_statusbar(const char *text);

 extern void js_canvas_set_size(int w, int h);

@@ -955,11 +954,9 @@

     resize();

     /*

-     * Create a status bar, if needed.

+     * Remove the status bar, if not needed.

      */

-    if (midend_wants_statusbar(me))

-        js_canvas_make_statusbar();

-    else

+    if (!midend_wants_statusbar(me))

         js_canvas_remove_statusbar();

     /*

--- a/emcclib.js

+++ b/emcclib.js

@@ -514,22 +514,6 @@

     },

     /*

-     * void js_canvas_make_statusbar(void);

-     * 

-     * Cause a status bar to exist. Called at setup time if the puzzle

-     * back end turns out to want one.

-     */

-    js_canvas_make_statusbar: function() {

-        if (statusbar === null) {

-            var statusholder = document.getElementById("statusbarholder");

-            statusbar = document.createElement("div");

-            statusbar.id = "statusbar";

-            statusbar.appendChild(document.createTextNode(" "));

-            statusholder.appendChild(statusbar);

-        }

-    },

-

-    /*

      * void js_canvas_remove_statusbar(void);

      *

      * Cause a status bar not to exist. Called at setup time if the