chore: clean up example (#24709)

Author: aljo242

.gitignore

@@ -52,6 +52,8 @@ vagrant
 .dir-locals.el
 .vscode
 
+.venv
+
 # Depinject & Graphviz
 dependency-graph.png
 debug_container.dot

store/streaming/abci/README.md

@@ -169,12 +169,6 @@ just trying the examples, you can skip ahead to the [Testing](#testing) section.
 make proto-gen 
 ```
 
-* stdout plugin; from inside the `store/` dir, run:
-
-```shell
-go build -o streaming/abci/examples/stdout/stdout streaming/abci/examples/stdout/stdout.go
-```
-
 * file plugin (writes to `~/`); from inside the `store/` dir, run:
 
 ```shell
@@ -185,12 +179,6 @@ go build -o streaming/abci/examples/file/file streaming/abci/examples/file/file.
 
 Export a plugin from one of the Go or Python examples.
 
-* stdout plugin
-
-```shell
-export COSMOS_SDK_ABCI="{path to}/cosmos-sdk/store/streaming/abci/examples/stdout/stdout"
-```
-
 * file plugin (writes to ~/)
 
 ```shell