mockftpserver: Remove pom.xml files

These files refer to projects that have security vulnerabilities and
this triggers automated tooling, but pom.xml files are not used in the
Android build so let's just remove those references entirely.

Bug: 198035760
Bug: 197815767
Bug: 195169577
Bug: 197815787
Bug: 198035853
Test: mma
Change-Id: I910928767d817a2aff22804b838a6c165ba4a431
21 files changed