patch 8.1.0763: nobody is using the Sun Workshop support

Problem:    Nobody is using the Sun Workshop support.
Solution:   Remove the Workshop support.
diff --git a/src/gui_beval.c b/src/gui_beval.c
index 9af17a9..3a28218 100644
--- a/src/gui_beval.c
+++ b/src/gui_beval.c
@@ -199,8 +199,7 @@
 #endif
 #endif /* !FEAT_GUI_W32 */
 
-#if defined(FEAT_SUN_WORKSHOP) || defined(FEAT_NETBEANS_INTG) \
-    || defined(FEAT_EVAL) || defined(PROTO)
+#if defined(FEAT_NETBEANS_INTG) || defined(FEAT_EVAL) || defined(PROTO)
 # if !defined(FEAT_GUI_W32) || defined(PROTO)
 
 /*
@@ -216,7 +215,7 @@
 	undrawBalloon(beval);
 }
 # endif /* !FEAT_GUI_W32 */
-#endif /* FEAT_SUN_WORKSHOP || FEAT_NETBEANS_INTG || PROTO */
+#endif /* FEAT_NETBEANS_INTG || PROTO */
 
 #if !defined(FEAT_GUI_W32) || defined(PROTO)
 #if defined(FEAT_BEVAL_TIP) || defined(PROTO)