[JAVA] Global apiKey securityScheme requires OAuth dependency to compile

Description

I've configured a single securityScheme and applied it globally as per the 'Describing API Keys' example here: https://swagger.io/docs/specification/authentication/api-keys/

In the auth package OAuth classes are still generated and ApiClient references OAuth classes even though they cannot be used.

Swagger-codegen version

<groupId>org.openapitools</groupId>
<artifactId>openapi-generator-maven-plugin</artifactId>
<version>3.1.1</version>

Swagger declaration file content or url

https://api.openfigi.com/schema with modifications

@@ -25,6 +25,13 @@
         }
     }],
     "components": {
+        "securitySchemes": {
+            "ApiKeyAuth": {
+                "type": "apiKey",
+                "in": "header",
+                "name": "X-OPENFIGI-APIKEY"
+            }
+        },
         "schemas": {
             "MappingJob": {
                 "type": "object",
@@ -64,8 +71,7 @@
                             "type": "string"
                         }, {
                             "type": "integer"
-                        }],
-                        "default": "string"
+                        }]
                     },
                     "exchCode": {
                         "type": "string",
@@ -82,7 +88,7 @@
                     "marketSecDes": {
                         "type": "string",
                         "nullable": true
-                    },
+                    }
                 }
             },
             "BulkMappingJob": {
@@ -95,7 +101,7 @@
                 "type": "object",
                 "properties": {
                     "figi": {
-                        "type": "string",
+                        "type": "string"
                     },
                     "securityType": {
                         "type": "string",
@@ -169,7 +175,7 @@
             },
             "MappingJobResult": {
                 "oneOf": [{
-                    "$ref": "#/components/schemas/MappingJobResultFigiList",
+                    "$ref": "#/components/schemas/MappingJobResultFigiList"
                 }, {
                     "$ref": "#/components/schemas/MappingJobResultFigiNotFound"
                 }]
@@ -260,5 +266,8 @@
                 }
             }
         }
+    },
+    "security": {
+        "ApiKeyAuth": []
     }
 }

Suggest a fix/enhancement

I want to avoid adding a dependency on org.apache.oltu.oauth2 to my project

Reproduce Java client generation with the modified OpenFIGI specification and inspect the generated auth package, ApiClient, and dependency configuration. The fix is complete when an apiKey-only security scheme generates a client that compiles without requiring org.apache.oltu.oauth2.