fix: Remove redundant default controller scope from app config (#342)

As singleton is the default scope for controllers since Grails 6.2 we
can remove this setting from the application config.

Related apache/grails-core#13332

Author: matrei

grails-forge-core/src/main/java/org/grails/forge/feature/web/GrailsWeb.java

@@ -52,7 +52,6 @@ public boolean supports(ApplicationType applicationType) {
     @Override
     public void apply(GeneratorContext generatorContext) {
         final Map<String, Object> config = generatorContext.getConfiguration();
-        config.put("grails.controllers.defaultScope", "singleton");
         config.put("grails.views.default.codec", "html");
         generatorContext.addBuildPlugin(GradlePlugin.builder().id("org.grails.grails-web").build());
     }

grails-forge-core/src/test/groovy/org/grails/forge/feature/web/GrailsWebSpec.groovy

@@ -25,9 +25,7 @@ class GrailsWebSpec extends ApplicationContextSpec implements CommandOutputFixtu
         final String applicationYaml = output["grails-app/conf/application.yml"]
         def config = new YamlSlurper().parseText(applicationYaml)
 
-
         then:
-        config.grails.controllers.defaultScope == 'singleton'
         config.grails.views.default.codec == 'html'
     }
 }