patch 8.1.0254: cannot build on MS-Windows; unused macro HAVE_HANDLE_DROP

Problem:    Cannot build on MS-Windows; Unused macro HAVE_HANDLE_DROP.
Solution:   Adjust #ifdef. Delete the macro.
diff --git a/src/main.c b/src/main.c
index b839050..d3a509b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -706,7 +706,7 @@
 	scroll_region_reset();		/* In case Rows changed */
     scroll_start();	/* may scroll the screen to the right position */
 
-#ifdef FEAT_TITLE
+#if defined(FEAT_TITLE) && (defined(UNIX) || defined(VMS) || defined(MACOS_X))
     term_push_title(SAVE_RESTORE_BOTH);
 #endif