[Ada] Remove tiny and incomplete optimization for unset references

Code cleanup; behaviour is unaffected.

gcc/ada/

	* sem_warn.adb (Check_Unset_Reference): The early test was only
	saving time of calls to Original_Node, Comes_From_Source and
	Nkind, which are all quick and cheap.

diff --git a/gcc/ada/sem_warn.adb b/gcc/ada/sem_warn.adb
index 8ca5c76..31ba4d1 100644 (file)
--- a/gcc/ada/sem_warn.adb
+++ b/gcc/ada/sem_warn.adb
@@ -1882,15 +1882,6 @@ package body Sem_Warn is
          return;
       end if;
 
-      --  Nothing to do for numeric or string literal. Do this test early to
-      --  save time in a common case (it does not matter that we do not include
-      --  character literal here, since that will be caught later on in the
-      --  when others branch of the case statement).
-
-      if Nkind (N) in N_Numeric_Or_String_Literal then
-         return;
-      end if;
-
       --  Ignore reference unless it comes from source. Almost always if we
       --  have a reference from generated code, it is bogus (e.g. calls to init
       --  procs to set default discriminant values).