remove .travis.yml since YaCy is not build on Travis CI anymore

.travis.yml

@@ -1,29 +0,0 @@
-dist: trusty
-language: java
-
-cache:
-  directories:
-  - $HOME/.m2
-
-jdk:
-  - oraclejdk8
-
-# only `sudo: true` allows running tests on Travis CI container infrastructure for faster builds, but testing installation of .deb makes sense
-sudo: true
-
-# Installing ghostscript (optional imagemagick dependency) is required for Html2ImageTest to run
-# dpkg-dev,debhelper,m4 and fakeroot packages are required for the 'ant deb' task
-before_install:
-  - sudo apt-get -qq update
-  - sudo apt-get install -y ghostscript dpkg-dev debhelper m4 fakeroot
-
-install:
-- cd libbuild && MAVEN_OPTS="-Xmx2g" mvn clean install && cd ..
-
-script:
-- MAVEN_OPTS="-Xmx2g" mvn clean install
-# test build instructions
-- ant
-- ant dist
-- ant deb
-- sudo dpkg -i ../yacy_*_all.deb