Both v1 and v2 of the AWS Ruby SDK accept the string literal AES256, no need to…

Both v1 and v2 of the AWS Ruby SDK accept the string literal AES256, no need to differentiate. (thank you, @trevorrowe)

lib/paperclip/storage/s3.rb

@@ -152,7 +152,7 @@ module Paperclip
 
           @s3_storage_class = set_storage_class(@options[:s3_storage_class])
 
-          @s3_server_side_encryption = aws_v1? ? :aes256 : "AES256"
+          @s3_server_side_encryption = "AES256"
           if @options[:s3_server_side_encryption].blank?
             @s3_server_side_encryption = false
           end

spec/paperclip/storage/s3_live_spec.rb

@@ -145,7 +145,6 @@ unless ENV["S3_BUCKET"].blank?
     end
 
     context "An attachment that uses S3 for storage and uses AES256 encryption" do
-      let(:encryption_method) { defined?(::AWS) ? :aes356 : "AES256" }
       before do
         rebuild_model styles: { thumb: "100x100", square: "32x32#" },
                       storage: :s3,
@@ -156,7 +155,7 @@ unless ENV["S3_BUCKET"].blank?
                         aws_access_key_id: ENV['AWS_ACCESS_KEY_ID'],
                         aws_secre_access_key: ENV['AWS_SECRET_ACCESS_KEY']
                       },
-                      s3_server_side_encryption: encryption_method
+                      s3_server_side_encryption: "AES256"
         Dummy.delete_all
         @dummy = Dummy.new
       end
@@ -178,7 +177,7 @@ unless ENV["S3_BUCKET"].blank?
           end
 
           it "is encrypted on S3" do
-            assert @dummy.avatar.s3_object.server_side_encryption == encryption_method
+            assert @dummy.avatar.s3_object.server_side_encryption == "AES256"
           end
         end
       end