fix: remove "hack" to skip schema-mapped models (#19191)

That method relied on the faulty assumption that toModelFilename does not consider mappings, which is not the case for multiple generators.

Author: Xiphoseer

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java

@@ -469,14 +469,7 @@ void generateModels(List<File> files, List<ModelMap> allModels, List<String> unu
             try {
                 //don't generate models that have an import mapping
                 if (config.schemaMapping().containsKey(name)) {
-                    LOGGER.debug("Model {} not imported due to import mapping", name);
-
-                    for (String templateName : config.modelTemplateFiles().keySet()) {
-                        // HACK: Because this returns early, could lead to some invalid model reporting.
-                        String filename = config.modelFilename(templateName, name);
-                        Path path = java.nio.file.Paths.get(filename);
-                        this.templateProcessor.skip(path, "Skipped prior to model processing due to schema mapping.");
-                    }
+                    LOGGER.info("Model {} not generated due to schema mapping", name);
                     continue;
                 }