diff --git a/lib/sqlite_extension.rb b/lib/sqlite_extension.rb
deleted file mode 100644
index 88d795a..0000000
--- a/lib/sqlite_extension.rb
+++ /dev/null
@@ -1,28 +0,0 @@
-if ApplicationRecord.connection.adapter_name.downcase == 'sqlite'
-
-  database = ApplicationRecord.connection.raw_connection
-
-  database.create_function('pow', 2, 1) do |func, base, exponent|
-    func.set_result(base.to_f ** exponent.to_f)
-  end
-
-  database.create_function('sqrt', 1, 1) do |func, value|
-    func.set_result(Math.sqrt(value))
-  end
-
-  database.create_function('radians', 1, 1) do |func, value|
-    func.set_result(value.to_f * Math::PI / 180.0)
-  end
-
-  database.create_function('spheric_distance', 5, 1) do |func, lat1, long1, lat2, long2, radius|
-    func.set_result(
-      radius.to_f * Math.acos(
-	[1,
-        Math.cos(lat1.to_f) * Math.cos(long1.to_f) * Math.cos(lat2.to_f) * Math.cos(long2.to_f) +
-         Math.cos(lat1.to_f) * Math.sin(long1.to_f) * Math.cos(lat2.to_f) * Math.sin(long2.to_f) +
-         Math.sin(lat1.to_f) * Math.sin(lat2.to_f)
-        ].min
-      )
-    )
-  end
-end
--
libgit2 0.21.2