patch 8.0.1118: FEAT_WINDOWS adds a lot of #ifdefs

Problem:    FEAT_WINDOWS adds a lot of #ifdefs while it is nearly always
            enabled and only adds 7% to the binary size of the tiny build.
Solution:   Graduate FEAT_WINDOWS.
diff --git a/src/charset.c b/src/charset.c
index 8b83f68..4f79c90 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -1092,10 +1092,7 @@
 	    && VIM_ISBREAK(c)
 	    && !VIM_ISBREAK((int)s[1])
 	    && wp->w_p_wrap
-# ifdef FEAT_WINDOWS
-	    && wp->w_width != 0
-# endif
-       )
+	    && wp->w_width != 0)
     {
 	/*
 	 * Count all characters from first non-blank after a blank up to next
@@ -1249,10 +1246,8 @@
     int		width1;		/* width of first line (after line number) */
     int		width2;		/* width of further lines */
 
-# ifdef FEAT_WINDOWS
     if (wp->w_width == 0)	/* there is no border */
 	return FALSE;
-# endif
     width1 = W_WIDTH(wp) - win_col_off(wp);
     if ((int)vcol < width1 - 1)
 	return FALSE;
@@ -2029,8 +2024,7 @@
     return c - '0';
 }
 
-#if defined(FEAT_TERMRESPONSE) \
-	|| (defined(FEAT_GUI_GTK) && defined(FEAT_WINDOWS)) || defined(PROTO)
+#if defined(FEAT_TERMRESPONSE) || defined(FEAT_GUI_GTK) || defined(PROTO)
 /*
  * Convert two hex characters to a byte.
  * Return -1 if one of the characters is not hex.