security: remove maven wrapper binary jar from the repo

[Shabirmean]

Fixes #200

• The maven wrapper jar was historically committed into the repo following the same practice in other open source projects
• However, recent security scanning on the repo has advised us to remove it completely.
• Thus removing it

[Shabirmean]

:zap: Two deployments have been created for the Point-of-Sale application. You may access and test them at: :zap:

• MySQL DB backed deployment: 34.29.70.180
• Embedded H2 DB backed deployment: 34.28.194.122