Deleting unused 'master' branch

1. INFRA-26751 I realized the master branch appeared again. Opened an INFRA jira to assist in removing it.

Apache Hadoop qbt Report: trunk+JDK11 on Linux/x86_64

For more details, see https://ci-hadoop.apache.org/job/hadoop-qbt-trunk-java11-linux-x86_64/846/ [Apr 11, 2025, 9:31:53 AM] (github) HADOOP-19537. Document skip.platformToolsetDetection option in BUILDING.txt (#7600) [Apr 11, 2025, 12:54:38 PM] (github) HADOOP-19527. S3A: Skip AAL tests if encr

Apache Hadoop qbt Report: branch-2.10+JDK7 on Linux/x86_64

For more details, see https://ci-hadoop.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86_64/1725/ No changes -1 overall The following subsystems voted -1: asflicense hadolint mvnsite pathlen unit The following subsystems voted -1 but were configured to be filtered/ignored: cc