Remove unnecessary `assert_valid_default`

This was added at c7c3f73 but it never raised because MySQL cannot
create text/blob columns with a default value.

1 files changed, 0 insertions, 7 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/mysql/column.rb b/activerecord/lib/active_record/connection_adapters/mysql/column.rb
index 9c45fdd44a..ea554b188c 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/column.rb
@@ -6,7 +6,6 @@ module ActiveRecord
 
         def initialize(*)
           super
-          assert_valid_default
           extract_default
         end
 
@@ -38,12 +37,6 @@ module ActiveRecord
             @default = null || strict ? nil : ''
           end
         end
-
-        def assert_valid_default
-          if blob_or_text_column? && default.present?
-            raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}"
-          end
-        end
       end
     end
   end