docs: remove http from batch execute docs (#1003)
`http=http` is optional
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Fixes #1002 🦕
diff --git a/docs/batch.md b/docs/batch.md
index b8b3105..260c128 100644
--- a/docs/batch.md
+++ b/docs/batch.md
@@ -70,7 +70,7 @@
batch.add(service.animals().list(), callback=list_animals)
batch.add(service.farmers().list(), callback=list_farmers)
-batch.execute(http=http)
+batch.execute()
```
```python
@@ -90,5 +90,5 @@
batch.add(service.animals().insert(name="sheep"))
batch.add(service.animals().insert(name="pig"))
batch.add(service.animals().insert(name="llama"))
-batch.execute(http=http)
+batch.execute()
```