Remove useless 'set' commands

.travis.yml

@@ -21,8 +21,6 @@ matrix:
       if: (branch = staging OR branch = trying OR branch = master) OR (type = pull_request AND branch = master)
 
 
-before_install: set -e
-
 install:
   - bash ci/install.sh
   - export PATH="$PATH:$PWD/gcc/bin"
@@ -30,7 +28,6 @@ install:
 script:
   - bash ci/script.sh
 
-after_script: set +e
 
 cache: cargo
 before_cache: