Enable MyGet uploads again

[shauheen]

#2240 required to disable the upload. Seems the issue is fixed now.

[codecov]

Codecov Report

Merging #2961 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2961      +/-   ##
==========================================
- Coverage   72.29%   72.28%   -0.01%     
==========================================
  Files         796      796              
  Lines      142349   142349              
  Branches    16051    16051              
==========================================
- Hits       102905   102902       -3     
- Misses      35063    35066       +3     
  Partials     4381     4381

Flag	Coverage Δ
#Debug	72.28% <ø> (-0.01%)	⬇️
#production	68% <ø> (-0.01%)	⬇️
#test	88.48% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
src/Microsoft.ML.Transforms/Text/LdaTransform.cs	89.26% <0%> (-0.63%)	⬇️
...ML.Transforms/Text/StopWordsRemovingTransformer.cs	85.69% <0%> (+0.16%)	⬆️

[eerhardt]

https://github.com/dotnet/core-eng/issues/5070 is still open. And @mmitche said he hasn't heard anything back from myget on the status.

I assume we will see official build errors once this goes in, but if you want to enable it again, I won't block you.

[shauheen]

@eerhardt , I spoke with @safern and he suggested that other repos don't seem to have this issue anymore. If it breaks again will take it out, but we haven't pushed to MyGet in almost a week.