Update build.sh

Author: neveler

scripts/build.sh

@@ -1,12 +1,5 @@
 #!/usr/bin/env bash
 
-touch Gemfile.lock
-chmod a+w Gemfile.lock
-chown -R jekyll:jekyll /drone
-gem sources --add https://mirrors.cloud.tencent.com/rubygems/ --remove https://rubygems.org/
-bundle config mirror.https://rubygems.org https://mirrors.cloud.tencent.com/rubygems
-bundle install
-
 bundle exec jekyll build --trace --verbose --destination _site --config _config.yml
 
 cp -r ./src/data ./data