updated for version 7.3.187
Problem: The RISC OS port has obvious errors and is not being maintained.
Solution: Remove the RISC OS files and code.
diff --git a/src/globals.h b/src/globals.h
index 4b55446..2c7f257 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1513,7 +1513,7 @@
EXTERN char_u e_sandbox[] INIT(= N_("E48: Not allowed in sandbox"));
#endif
EXTERN char_u e_secure[] INIT(= N_("E523: Not allowed here"));
-#if defined(AMIGA) || defined(MACOS) || defined(MSWIN) || defined(RISCOS) \
+#if defined(AMIGA) || defined(MACOS) || defined(MSWIN) \
|| defined(UNIX) || defined(VMS) || defined(OS2)
EXTERN char_u e_screenmode[] INIT(= N_("E359: Screen mode setting not supported"));
#endif