diff --git a/app/models/lecture.rb b/app/models/lecture.rb
deleted file mode 100644
index bdf971d..0000000
--- a/app/models/lecture.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-class Lecture < Event
-  validates :length, numericality: {greater_than_or_equal_to: 40, less_than_or_equal_to: 45}
-end
diff --git a/app/models/workshop.rb b/app/models/workshop.rb
deleted file mode 100644
index afe44aa..0000000
--- a/app/models/workshop.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-class Workshop < Event
-  validates :length, numericality: {greater_than_or_equal_to: 30, less_than_or_equal_to: 120}
-end