win32: drop workaround for Wine console buffer

Commit 1ade2225d2 (winansi: allow alternative screen buffer to be
disabled) added a workaround for the broken alternative screen
buffer in the Wine console.

The problem has been fixed in Wine for well over a year:

   https://bugs.winehq.org/show_bug.cgi?id=54287

Remove the workaround.

Saves 80-96 bytes.

2 files changed, 3 insertions, 10 deletions

diff --git a/libbb/messages.c b/libbb/messages.c
index 27ba244d6..311eda004 100644
--- a/libbb/messages.c
+++ b/libbb/messages.c
@@ -36,9 +36,9 @@ const char bb_busybox_exec_path[] ALIGN1 = CONFIG_BUSYBOX_EXEC_PATH;
 /* Some special shell variables are placed in the environment immediately
  * when they're exported.
  *
- * BB_GLOBBING and BB_UMASK are excluded because users shouln't be
- * messing with them; BB_ALT_BUFFER and BB_FIX_BACKSLASH are excluded
- * because they only affect particular applets, not the shell itself.
+ * BB_GLOBBING and BB_UMASK are excluded because users shouldn't be
+ * messing with them; BB_FIX_BACKSLASH is excluded because it only
+ * affects particular applets, not the shell itself.
  *
  * If you change any of these you should also update the definitions in
  * include/libbb.h.
diff --git a/win32/winansi.c b/win32/winansi.c
index 12892e697..c7529c453 100644
--- a/win32/winansi.c
+++ b/win32/winansi.c
@@ -200,15 +200,8 @@ static HANDLE dup_handle(HANDLE h)
 static void use_alt_buffer(int flag)
 {
         static HANDLE console_orig = INVALID_HANDLE_VALUE;
-        const char *var;
         HANDLE console, h;
 
-        var = getenv("BB_ALT_BUFFER");
-        if (var ? strcmp(var, "0") == 0 : is_wine()) {
-                reset_screen();
-                return;
-        }
-
         if (flag) {
                 SECURITY_ATTRIBUTES sa;
                 CONSOLE_SCREEN_BUFFER_INFO sbi;