patch 8.0.1566: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate FEAT_SCROLLBIND and FEAT_CURSORBIND.
diff --git a/src/window.c b/src/window.c
index 23c324b..337f84d 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4498,9 +4498,7 @@
 #endif
     new_wp->w_botline = 2;
     new_wp->w_cursor.lnum = 1;
-#ifdef FEAT_SCROLLBIND
     new_wp->w_scbind_pos = 1;
-#endif
 
     /* We won't calculate w_fraction until resizing the window */
     new_wp->w_fraction = 0;
@@ -5659,11 +5657,7 @@
 
     /* Don't change w_topline when height is zero.  Don't set w_topline when
      * 'scrollbind' is set and this isn't the current window. */
-    if (height > 0
-#ifdef FEAT_SCROLLBIND
-	    && (!wp->w_p_scb || wp == curwin)
-#endif
-       )
+    if (height > 0 && (!wp->w_p_scb || wp == curwin))
     {
 	/*
 	 * Find a value for w_topline that shows the cursor at the same