Resolve Python 3.4 Build Issues on Appveyor

[whart222]

Fixes

• Resolves build issue for Appveyor.

Summary/Motivation:

• Updated Appveyor config file.

Changes proposed in this PR:

• Removing conda update, which was taking too long.

Legal Acknowledgement

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[codecov-io]

Codecov Report

Merging #438 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #438   +/-   ##
=======================================
  Coverage   66.36%   66.36%           
=======================================
  Files         487      487           
  Lines       63180    63180           
=======================================
  Hits        41928    41928           
  Misses      21252    21252

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[jsiirola]

I do not quite understand the fix. The comment implies that we are "disabling the update", but the change doesn't actually disable the update.

[jsiirola]

This comment doesn't seem to match the remark below: you are not disabling the update, just removing the explicit tie to the Anaconda channel. Either we should remove line 77 below, or correct this comment.

[whart222]

Done.