removed template engine method from interface.

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/CodegenConfig.java

@@ -129,7 +129,7 @@ public interface CodegenConfig {
 
     Mustache.Compiler processCompiler(Mustache.Compiler compiler);
 
-    TemplateEngine getTemplateEngine();
+//    TemplateEngine getTemplateEngine();
 
     String sanitizeTag(String tag);
 

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/DefaultGenerator.java

@@ -5,6 +5,7 @@
 import com.github.jknack.handlebars.io.FileTemplateLoader;
 import com.github.jknack.handlebars.io.TemplateLoader;
 import io.swagger.codegen.v3.ignore.CodegenIgnoreProcessor;
+import io.swagger.codegen.v3.templates.HandlebarTemplateEngine;
 import io.swagger.codegen.v3.templates.TemplateEngine;
 import io.swagger.codegen.v3.utils.ImplementationVersion;
 import io.swagger.codegen.v3.utils.URLPathUtil;
@@ -94,7 +95,8 @@ public Generator opts(ClientOptInput opts) {
             this.ignoreProcessor = new CodegenIgnoreProcessor(this.config.getOutputDir());
         }
 
-        this.templateEngine = config.getTemplateEngine();
+//        this.templateEngine = config.getTemplateEngine();
+        this.templateEngine = new HandlebarTemplateEngine(config);
 
         return this;
     }