Remove Dependency Scanning and License Scanning support for sbt 1.0.x

Why are we doing this work

Relevant links

Non-functional requirements

• Documentation:
• Feature flag:
• Performance:
• Testing:

Implementation plan

I don't think it is worth adding extra code to explicitely fail with sbt 1.0.x as the pluging we use for supporting this version is still necessary for 1.1, 1.2, 1.3 versions that we still support.

• Add a note to the sbt plugin setup
• remove the corresponding spec
• udpate the documentation

Verification steps