Remove daily samples build (#304)

The daily build of samples is no longer necessary, since a build occurs:

- When a change to the `main` branch is pushed.
- When a new snapshot or release is built in `logging-log4j2`.
- When a PR in this repo is evaluated.

This should account for all the possible factors that can influence the result of a build.

Author: ppkarwasz

.github/workflows/build.yaml

@@ -30,8 +30,6 @@ on:
       - "**.adoc"
       - "**.md"
       - "**.txt"
-  schedule:
-    - cron: "29 17 * * *"
 
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