move intern() to mem.c

Being in lex.c was vestigial, since it was being used all over the
frontend and backend.

1 files changed, 0 insertions, 1 deletions

diff --git a/ir/ir.c b/ir/ir.c
index 13b309d..d932121 100644
--- a/ir/ir.c
+++ b/ir/ir.c
@@ -152,7 +152,6 @@ mkdatref(const char *name, union type ctype, uint siz, uint align, const void *b
 
    assert(n <= siz && siz && align);
    if (!name) {
-      extern const char *intern(const char *);
       char buf[32];
       struct wbuf wbuf = MEMBUF(buf, sizeof buf);