amd64_edac: Drop redundant declarations

Those were moved to the mce_amd.h header.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index 4ece4f4..fe2cc30 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -409,14 +409,6 @@
 	} flags;
 };
 
-extern const char *tt_msgs[4];
-extern const char *ll_msgs[4];
-extern const char *rrrr_msgs[16];
-extern const char *to_msgs[2];
-extern const char *pp_msgs[4];
-extern const char *ii_msgs[4];
-extern const char *htlink_msgs[8];
-
 #ifdef CONFIG_EDAC_DEBUG
 #define NUM_DBG_ATTRS 5
 #else