fix: remove unsupported operators in angular material object renderer

The Angular Material object renderer sometimes also takes over the responsibility to render
'oneOf', 'anyOf' and 'allOf' because we don't support these constructs in Angular Material yet.
However this then leads to errors. Therefore we no longer consider these combinators
during rendering.

closes #2083

packages/angular-material/src/other/object.renderer.ts

@@ -32,13 +32,15 @@ import {
 import {
   ControlWithDetailProps,
   findUISchema,
+  Generate,
   GroupLayout,
   isObjectControl,
   RankedTester,
   rankWith,
   setReadonly,
   UISchemaElement,
 } from '@jsonforms/core';
+import { cloneDeep } from 'lodash';
 
 @Component({
   selector: 'ObjectRenderer',
@@ -65,7 +67,14 @@ export class ObjectControlRenderer extends JsonFormsControlWithDetail {
       props.schema,
       props.uischema.scope,
       props.path,
-      'Group',
+      () => {
+        const newSchema = cloneDeep(props.schema);
+        // delete unsupported operators
+        delete newSchema.oneOf;
+        delete newSchema.anyOf;
+        delete newSchema.allOf;
+        return Generate.uiSchema(newSchema, 'Group');
+      },
       props.uischema,
       props.rootSchema
     );