TST: remove 4 builds from travis that are on circleci
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15465?src=pr&el=h1) Report
> Merging [#15465](https://codecov.io/gh/pandas-dev/pandas/pull/15465?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/bb2144a32cb30bc7428b117389a280b2515e9cf1?src=pr&el=desc) will **decrease** coverage by `-0.01%`.
> The diff coverage is `n/a`.


```diff
@@            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](https://codecov.io/gh/pandas-dev/pandas/pull/15465?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/tseries/index.py](https://codecov.io/gh/pandas-dev/pandas/compare/bb2144a32cb30bc7428b117389a280b2515e9cf1...8026eb53580d029e9cc4a1962da0895cb9fa54db?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvaW5kZXgucHk=) | `95.32% <ø> (-0.1%)` | :x: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15465?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15465?src=pr&el=footer). Last update [bb2144a...8026eb5](https://codecov.io/gh/pandas-dev/pandas/compare/bb2144a32cb30bc7428b117389a280b2515e9cf1...8026eb53580d029e9cc4a1962da0895cb9fa54db?el=footer&src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments). 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).

 > 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 great

note that circle does automatic canceling of prior bukids 