Revert "travis: try increasing swap"

This reverts commit e95d863fd4.

.travis.yml

@@ -44,14 +44,6 @@ before_script:
  - cd ../
 
 script:
- # increase swap size
- - free -k
- - swapon -s
- - sudo dd if=/dev/zero of=/newswap bs=1M count=512
- - sudo mkswap /newswap
- - sudo swapon /newswap
- - free -k
- - swapon -s
  - ./configure CXX="${CXX}" CC="${CC}" CUSTOM_CXXFLAGS="${CUSTOM_CXXFLAGS}" CUSTOM_LDFLAGS="${CUSTOM_LDFLAGS}" XML_PARSER="${XML_PARSER}" ENABLE_LOG="${ENABLE_LOG}" DEBUG="${DEBUG}" DEMO="${DEMO}" BENCHMARK="${BENCHMARK}" CPP_TESTS=True CAIRO=True FAST=True || cat config.log
  - if [[ "${DEBUG}" == true ]]; then JOBS=2 make; else JOBS=4 make; fi;
  - git clone https://github.com/mapbox/mapnik-test-data tests/data/mapnik-test-data