minor #566 Remove non-existing variable usage in Ollama chat example (welcoMattic)

This PR was merged into the main branch.

Discussion
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Remove non-existing variable usage in Ollama chat example

| Q             | A
| ------------- | ---
| Bug fix?      | yes| New feature?  | yes/no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | yes <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

Commits
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21873f7 Remove non-existing variable usage in Ollama chat example

Author: welcoMattic

examples/ollama/chat-llama.php

@@ -33,5 +33,3 @@
 } catch(InvalidArgumentException $e) {
     echo $e->getMessage() . "\nMaybe use a different model?\n";
 }
-
-echo $response;