fix:remove print maven repo username

Author: dixuswe

.kokoro/release.sh

@@ -19,7 +19,6 @@ setup_environment_secrets() {
   export SONATYPE_USERNAME=$(cat ${KOKORO_KEYSTORE_DIR}/75669_functions-framework-java-release-bot-sonatype-password | cut -f1 -d':')
   export SONATYPE_PASSWORD=$(cat ${KOKORO_KEYSTORE_DIR}/75669_functions-framework-java-release-bot-sonatype-password | cut -f2 -d':')
   export GPG_PASSPHRASE=$(cat ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-passphrase)
-  echo $SONATYPE_USERNAME
 
   # Add the key ring files to $GNUPGHOME to verify the GPG credentials.
   export GNUPGHOME=/tmp/gpg