remove dead code

app/services/bulk_upload/lettings/validator.rb

@@ -1,5 +1,3 @@
-require "csv"
-
 class BulkUpload::Lettings::Validator
   include ActiveModel::Validations
 
@@ -68,19 +66,6 @@ class BulkUpload::Lettings::Validator
     errors.count == errors.where(category: "soft_validation").count && errors.count.positive?
   end
 
-  def over_column_error_threshold?
-    fields = ("field_1".."field_134").to_a
-    percentage_threshold = (row_parsers.size * COLUMN_PERCENTAGE_ERROR_THRESHOLD).ceil
-
-    fields.any? do |field|
-      count = row_parsers.count { |row_parser| row_parser.errors[field].present? }
-
-      next if count < COLUMN_ABSOLUTE_ERROR_THRESHOLD
-
-      count > percentage_threshold
-    end
-  end
-
   def any_logs_already_exist?
     row_parsers.any?(&:log_already_exists?)
   end