diff --git a/modules/openapi-generator/src/test/resources/bugs/issue_18975.yaml b/modules/openapi-generator/src/test/resources/bugs/issue_18975.yaml
deleted file mode 100755
index b50ba0d66e74..000000000000
--- a/modules/openapi-generator/src/test/resources/bugs/issue_18975.yaml
+++ /dev/null
@@ -1,47 +0,0 @@
-openapi: 3.0.1
-info:
-  title: sample issue 18975
-  description: sample issue 18975
-  version: "1.0"
-paths:
-  /sample:
-    get:
-      summary: sample
-      operationId: getSample
-      responses:
-        "200":
-          description: Found vehicle.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/DifficultType'
-components:
-  schemas:
-    SubA:
-      required:
-        - type
-      type: object
-      properties:
-        type:
-          type: string
-        sim:
-          type: string
-    SubB:
-      required:
-        - type
-      type: object
-      properties:
-        type:
-          type: string
-        system:
-          type: string
-    DifficultType:
-      type: object
-      discriminator:
-        propertyName: type
-        mapping:
-          "typeA": '#/components/schemas/SubA'
-          "typeB": '#/components/schemas/SubB'
-      anyOf:
-        - $ref: '#/components/schemas/SubA'
-        - $ref: '#/components/schemas/SubB'