remove unnecessary change for ruby codegen

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/RubyClientCodegen.java

@@ -156,12 +156,20 @@ public class RubyClientCodegen extends DefaultCodegen implements CodegenConfig {
 
         cliOptions.add(new CliOption(GEM_AUTHOR_EMAIL, "gem author email (only one is supported)."));
 
+        cliOptions.add(new CliOption(CodegenConstants.HIDE_GENERATION_TIMESTAMP, "hides the timestamp when files were generated").
+                defaultValue(Boolean.TRUE.toString()));
+
     }
 
     @Override
     public void processOpts() {
         super.processOpts();
 
+        // default HIDE_GENERATION_TIMESTAMP to true
+        if (!additionalProperties.containsKey(CodegenConstants.HIDE_GENERATION_TIMESTAMP)) {
+            additionalProperties.put(CodegenConstants.HIDE_GENERATION_TIMESTAMP, Boolean.TRUE.toString());
+        }
+
         if (additionalProperties.containsKey(GEM_NAME)) {
             setGemName((String) additionalProperties.get(GEM_NAME));
         }

modules/swagger-codegen/src/main/resources/ruby/README.mustache

@@ -10,7 +10,9 @@ This SDK is automatically generated by the [Swagger Codegen](https://github.com/
 
 - API version: {{appVersion}}
 - Package version: {{gemVersion}}
+{{^hideGenerationTimestamp}}
 - Build date: {{generatedDate}}
+{{/hideGenerationTimestamp}}
 - Build package: {{generatorClass}}
 {{#infoUrl}}
 For more information, please visit [{{{infoUrl}}}]({{{infoUrl}}})

modules/swagger-codegen/src/test/java/io/swagger/codegen/options/RubyClientOptionsProvider.java

@@ -39,6 +39,7 @@ public class RubyClientOptionsProvider implements OptionsProvider {
                 .put(RubyClientCodegen.GEM_AUTHOR_EMAIL, GEM_AUTHOR_EMAIL_VALUE)
                 .put(CodegenConstants.SORT_PARAMS_BY_REQUIRED_FLAG, SORT_PARAMS_VALUE)
                 .put(CodegenConstants.ENSURE_UNIQUE_PARAMS, ENSURE_UNIQUE_PARAMS_VALUE)
+                .put(CodegenConstants.HIDE_GENERATION_TIMESTAMP, "true")
                 .build();
     }