fix: cleanup unnecessary options for examples (#1169)

Author: georgeh0

examples/text_embedding/main.py

@@ -71,18 +71,6 @@ def text_embedding_flow(
                 metric=cocoindex.VectorSimilarityMetric.COSINE_SIMILARITY,
             )
         ],
-        attachments=[
-            cocoindex.targets.PostgresSqlCommand(
-                name="new_column_foo",
-                setup_sql="ALTER TABLE TextEmbedding__doc_embeddings DROP COLUMN IF EXISTS foo; ALTER TABLE TextEmbedding__doc_embeddings ADD COLUMN foo TEXT",
-                teardown_sql="ALTER TABLE TextEmbedding__doc_embeddings DROP COLUMN IF EXISTS foo",
-            ),
-            cocoindex.targets.PostgresSqlCommand(
-                name="new_column_bar",
-                setup_sql="ALTER TABLE TextEmbedding__doc_embeddings ADD COLUMN bar TEXT",
-                teardown_sql="ALTER TABLE TextEmbedding__doc_embeddings DROP COLUMN IF EXISTS bar",
-            ),
-        ],
     )