Stop explicitly requesting Javadoc and source jars.

Thanks to the configuration changes of cl/805973207, snapshot deployment is [still broken but in a new way](https://github.com/google/truth/actions/runs/17657020721/job/50182316838): ``` [INFO] >>> source:3.3.1:jar (default-cli) > generate-sources @ truth >>> ... [INFO] <<< source:3.3.1:jar (default-cli) < generate-sources @ truth <<< [INFO] [INFO] [INFO] --- source:3.3.1:jar (default-cli) @ truth --- [INFO] Building jar: /home/runner/work/truth/truth/core/target/truth-HEAD-SNAPSHOT-sources.jar ... [INFO] >>> source:3.3.1:jar (attach-sources) > generate-sources @ truth >>> ... [INFO] <<< source:3.3.1:jar (attach-sources) < generate-sources @ truth <<< [INFO] [INFO] [INFO] --- source:3.3.1:jar (attach-sources) @ truth --- [INFO] Building jar: /home/runner/work/truth/truth/core/target/truth-HEAD-SNAPSHOT-sources.jar Error: We have duplicated artifacts attached. ``` The problem is that we're not only requesting Javadoc and source jars explicitly on the command line (which triggers the `default-cli` execution) but also getting them automatically because of the configuration changes of my CL. The solution is to stop requesting them explicitly. That matches [what we do for Guava snapshots](https://github.com/google/guava/blob/087f2c4a8012fb1256f80f6f776df0e8706af683/util/deploy_snapshot.sh#L8). It also matches what we do for non-snapshot releases. RELNOTES=n/a PiperOrigin-RevId: 807772725

Author: cpovirk

.github/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
  env:
  CI_DEPLOY_USERNAME: ${{ secrets.CI_DEPLOY_USERNAME }}
  CI_DEPLOY_PASSWORD: ${{ secrets.CI_DEPLOY_PASSWORD }}
- run: mvn -B clean source:jar javadoc:jar deploy -DskipTests=true
+ run: mvn -B clean deploy -DskipTests=true
 
  generate_docs:
  permissions: