Remove old travis config

[terriko]

No description provided.

[codecov-commenter]

Codecov Report

Merging #744 into master will decrease coverage by 6.23%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #744      +/-   ##
==========================================
- Coverage   86.97%   80.73%   -6.24%     
==========================================
  Files         125      125              
  Lines        2372     2372              
  Branches      275      275              
==========================================
- Hits         2063     1915     -148     
- Misses        245      393     +148     
  Partials       64       64              

Flag	Coverage Δ
#longtests	80.73% <ø> (-6.24%)	⬇️

Impacted Files	Coverage Δ
test/test_json.py	61.76% <0.00%> (-29.42%)	⬇️
cve_bin_tool/cvedb.py	53.14% <0.00%> (-29.25%)	⬇️
cve_bin_tool/checkers/xml2.py	61.36% <0.00%> (-27.28%)	⬇️
test/test_cli.py	82.50% <0.00%> (-17.50%)	⬇️
test/test_scanner.py	87.83% <0.00%> (-8.11%)	⬇️
cve_bin_tool/cli.py	82.60% <0.00%> (-5.44%)	⬇️
cve_bin_tool/extractor.py	55.14% <0.00%> (-1.48%)	⬇️
cve_bin_tool/VersionSignature.py	89.36% <0.00%> (+2.12%)	⬆️

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