Avoid warning '"Pos64" is already use-visible'

Change-Id: If18a630d8e8a4e2439582777ef1bb969b7b88c6f
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/libhwbase/+/76490
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
diff --git a/debug/hw-debug.adb b/debug/hw-debug.adb
index 4873979..b9f9f89 100644
--- a/debug/hw-debug.adb
+++ b/debug/hw-debug.adb
@@ -16,7 +16,6 @@
 with HW.Debug_Sink;
 
 use type HW.Word64;
-use type HW.Int64;
 
 package body HW.Debug
 with