Remove use of astropy and openastronomy conda channels on travis-ci
@@ -37,7 +37,7 @@ env:
- PIP_DEPENDENCIES='uncertainties'
- - CONDA_CHANNELS='conda-forge astropy sherpa openastronomy'
+ - CONDA_CHANNELS='conda-forge sherpa'
- FETCH_GAMMAPY_EXTRA=true
- FETCH_GAMMA_CAT=true
