patch 8.1.0670: macro for popup menu width is unused

Problem:    Macro for popup menu width is unused.
Solution:   Remove it. (Hirohito Higashi)

src/popupmnu.c

@@ -41,7 +41,6 @@ static int pum_do_redraw = FALSE;	/* do redraw anyway */
 static int pum_set_selected(int n, int repeat);
 
 #define PUM_DEF_HEIGHT 10
-#define PUM_DEF_WIDTH  15
 
     static void
 pum_compute_size(void)

src/version.c

@@ -799,6 +799,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    670,
 /**/
     669,
 /**/