cleanup: delete old ANT & Eclipse files

[erisu]

Motivation, Context & Description

Remove old ANT/Eclipse related files.

Testing

• npm t

Checklist

• I've run the tests to see all new and existing tests pass

[codecov-commenter]

Codecov Report

Merging #1272 (17ce6f0) into master (68a302e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1272   +/-   ##
=======================================
  Coverage   73.26%   73.26%           
=======================================
  Files          21       21           
  Lines        1646     1646           
=======================================
  Hits         1206     1206           
  Misses        440      440           

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[raphinesse]

This probably should also remove the VERSION file. Seems it is only referenced from build.xml

Other than that: would be great to get rid of these seemingly long obsolete files.

[erisu]

I will create a separate PR for removing the VERSION file.

I think that the file was not from ANT nor Eclipse. I think it was something we created to easily manage the cordova-android version in one location and use it in places like ANT. I think it was apart of the pre-npm registry era.

Even through after this PR is merged, there should be no references to this file. I just want to make sure we can easily revert the VERSION drop if there was something unexpected that was not in our radar.

As for ANT & Eclipse, these are outdated tools that isnt genrally used or prefered for Android development/release anymore.