.travis.yml: remove "brew update"

The packages from the Travis image are good enough, and this speeds up the Travis build.

.travis.yml: remove "brew update"
23fcfdbd · Max Kellermann · 3401d26d · 23fcfdbd
Commit 23fcfdbd authored Dec 24, 2019 by Max Kellermann
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.travis.yml .travis.yml +0 -2

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--- a/.travis.yml
+++ b/.travis.yml
@@ -91,8 +91,6 @@ before_cache:

 before_install:
  - eval "${MATRIX_EVAL}"
-  # C++14
-  - test "$TRAVIS_OS_NAME" != "osx" || brew update

 install:
  # C++14