buffer: remove useless buffer_add_xmlescaped()

Signed-off-by: Julien Danjou <julien@danjou.info>

common/buffer.c

@@ -114,40 +114,3 @@ buffer_detach(buffer_t *buf)
     buffer_init(buf);
     return res;
 }
-
-/** Add a string to a buffer, escaping XML chars.
- * \param buf Where to add data.
- * \param s The string to add.
- */
-void
-buffer_add_xmlescaped(buffer_t *buf, const char *s)
-{
-    for(;;)
-    {
-        int len = strcspn(s, "&<>'\"");
-        buffer_add(buf, s, len);
-        s += len;
-
-        switch (*s++)
-        {
-          case '\0':
-            return;
-          case '&':
-            buffer_adds(buf, "&amp;");
-            break;
-          case '<':
-            buffer_adds(buf, "&lt;");
-            break;
-          case '>':
-            buffer_adds(buf, "&gt;");
-            break;
-          case '\'':
-            /* OG: why not use default? */
-            buffer_adds(buf, "&#39;");
-            break;
-          case '"':
-            buffer_adds(buf, "&#34;");
-            break;
-        }
-    }
-}

common/buffer.h

@@ -192,7 +192,4 @@ void buffer_addvf(buffer_t *buf, const char *fmt, va_list)
 void buffer_addf(buffer_t *buf, const char *fmt, ...)
     __attribute__((format(printf, 2, 3)));
 
-
-void buffer_add_xmlescaped(buffer_t *buf, const char *s);
-
 #endif