diff --git a/extras/post-install.sh b/extras/post-install.sh
index 4cff268e639ba0e5c8c1410804c7e4bd9b0be1e3..6b0735c4f67d4ad1a4fc46fc64a74a3c52d70c6c 100644
--- a/extras/post-install.sh
+++ b/extras/post-install.sh
@@ -318,14 +318,6 @@ CREATE TABLE Link (
   PRIMARY KEY (mrnaAcc),
   UNIQUE KEY protAcc (protAcc)
 );
-CREATE TABLE mm1 (
-  hg18 char(50) DEFAULT NULL,
-  hg19 char(50) DEFAULT NULL
-);
-CREATE TABLE mm2 (
-  hg18 char(50) DEFAULT NULL,
-  hg19 char(50) DEFAULT NULL
-);
 EOF
 
 # The remainder is essentially the same as post-upgrade.sh