brew, diagnostic: tweak CI variable checks.

I've adjusted test-bot in:
https://github.com/Homebrew/homebrew-test-bot/commit/603918939a58a8d6351177fe35f0193b79549dfa
to set CI=1 for Jenkins to make future JENKINS_HOME checks unnecessary.

The only `TRAVIS_*` variable we care about is `TRAVIS_SUDO` so whitelist
that specifically rather than passing through loads of others.

1 files changed, 2 insertions, 2 deletions

diff --git a/bin/brew b/bin/brew
index 881ace1ec..34c28056b 100755
--- a/bin/brew
+++ b/bin/brew
@@ -66,9 +66,9 @@ then
 
   FILTERED_ENV=()
   # Filter all but the specific variables.
-  for VAR in HOME SHELL PATH TERM LOGNAME USER CI TRAVIS SSH_AUTH_SOCK SUDO_ASKPASS \
+  for VAR in HOME SHELL PATH TERM LOGNAME USER CI TRAVIS TRAVIS_SUDO SSH_AUTH_SOCK SUDO_ASKPASS \
              http_proxy https_proxy ftp_proxy no_proxy all_proxy HTTPS_PROXY FTP_PROXY ALL_PROXY \
-             "${!HOMEBREW_@}" "${!TRAVIS_@}" "${!JENKINS_@}"
+             "${!HOMEBREW_@}"
   do
     # Skip if variable value is empty.
     [[ -z "${!VAR}" ]] && continue