TST: remove 4 builds from travis that are on circleci

[jreback]

No description provided.

[codecov-io]

Codecov Report

Merging #15465 into master will decrease coverage by -0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #15465      +/-   ##
==========================================
- Coverage   90.37%   90.37%   -0.01%     
==========================================
  Files         135      135              
  Lines       49476    49476              
==========================================
- Hits        44713    44712       -1     
- Misses       4763     4764       +1

Impacted Files	Coverage Δ
pandas/tseries/index.py	95.32% <ø> (-0.1%)	❌

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[jreback]

just a note to everyone, you can go to: https://circleci.com/gh/pandas-dev/pandas
to see the circleci builds. This is now fully active and should build on all PR's and pushes to master.

all of the core team should have permissions to interact with this (you need to login to circle, and then add pandas-dev/pandas I think).

[jorisvandenbossche]

all of the core team should have permissions to interact with this (you need to login to circle, and then add pandas-dev/pandas I think).

Just tested that I can restart a build, so I have indeed permissions

[jreback]

great

note that circle does automatic canceling of prior bukids