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/c/builtin.c b/c/builtin.c
index a923bf1..aabd750 100644
--- a/c/builtin.c
+++ b/c/builtin.c
@@ -113,7 +113,6 @@ void
 putbuiltins(struct env *env)
 {
    for (int i = 0; i < countof(tab); ++i) {
-      const char *intern(const char *);
       envadddecl(env, &(struct decl) {
          .name = intern(tab[i].name),
          .isbuiltin = 1,