diff --git a/sql/patch_74_75_a.sql b/sql/patch_74_75_a.sql
deleted file mode 100644
index b5c587b45e401c21bde6abe70554ab56ce07cf6b..0000000000000000000000000000000000000000
--- a/sql/patch_74_75_a.sql
+++ /dev/null
@@ -1,12 +0,0 @@
-# patch_74_75_a.sql
-#
-# Title: Update schema version.
-#
-# Description:
-#   Update schema_version in meta table to 75.
-
-UPDATE meta SET meta_value='75' WHERE meta_key='schema_version';
-
-# Patch identifier
-INSERT INTO meta (species_id, meta_key, meta_value)
-  VALUES (NULL, 'patch', 'patch_74_75_a.sql|schema_version');
diff --git a/sql/patch_74_75_b.sql b/sql/patch_74_75_b.sql
deleted file mode 100644
index 860c35081d63fd894804cf6f6adca610877901c7..0000000000000000000000000000000000000000
--- a/sql/patch_74_75_b.sql
+++ /dev/null
@@ -1,13 +0,0 @@
-# patch_74_75_b.sql
-#
-# Title: Add source to transcript
-#
-# Description: Column allowing an optional source to be added to a transcript
-
-ALTER TABLE transcript ADD COLUMN source VARCHAR(20) NOT NULL;
-
-# Patch identifier
-INSERT INTO meta (species_id, meta_key, meta_value)
-  VALUES (NULL, 'patch', 'patch_74_75_b.sql|transcript_source');
-
-