Remove g++-4.8 apt package from Travis (facebook#66)

Author: Lars-Magnus Skog

.travis.yml

@@ -2,15 +2,7 @@ sudo: false
 
 language: node_js
 
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - g++-4.8
-
 before_install:
-  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export CXX=g++-4.8; fi
   - export JOBS=max
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export JOBS=4; fi