Appraisals in sql_enum-0.3.1 vs Appraisals in sql_enum-0.4.0

@@ -1,15 +1,12 @@
-appraise "rails-5.1" do
-  gem "rails", "~> 5.1.0"
-end
-
-appraise "rails-5.2" do
-  gem "rails", "~> 5.2.0"
-end
-
 appraise "rails-6.0" do
   gem "rails", "~> 6.0.0"
 end
 
 appraise "rails-6.1" do
   gem "rails", "~> 6.1.0"
 end
+
+# Rails 7.0 doesn't work yet
+# appraise "rails-7.0" do
+#   gem "rails", "~> 7.0"
+# end
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