Pare back travis now that the xerces upgrade fixed the build.

.travis.yml

@@ -2,23 +2,12 @@ language: java
 
 dist: bionic
 
-env:
-  - ANT="apache-ant-1.10.6"
-
-cache:
-    directories:
-        - ${ANT}
-
 before_install:
     - sudo apt-get update
     - sudo apt-get install -y xmlstarlet ant ant-optional
-      #- if [ -d "${ANT}" ]; then echo "${ANT} already downloaded..."; ls -l ${ANT}; fi
-      #- if [ -d "apache-ant-1.10.6" ]; then echo "Downloading ${ANT}..."; wget https://www.apache.org/dist/ant/binaries/${ANT}-bin.tar.gz; tar -xzvf ${ANT}-bin.tar.gz; fi
-      #- export PATH=`pwd`/${ANT}/bin:$PATH
 
 install:
     - ant -diagnostics
-    - free -m
 
 script:
     - xmlstarlet val -e -s xsd/eml.xsd src/test/resources/eml-sample.xml