remove vestiges of JDK 6 build

Author: SethTisue

.sbtrepos

@@ -1,5 +1,3 @@
-sudo: required
-
 language: scala
 jdk:
   - oraclejdk8

.travis.yml

@@ -60,8 +60,4 @@ if [[ "$TRAVIS_TAG" =~ $tagPat ]]; then
   fi
 fi
 
-if [[ "$TRAVIS_JDK_VERSION" == "openjdk6" ]]; then
-  SBTOPTS="-Dsbt.override.build.repos=true -Dsbt.repository.config=./.sbtrepos"
-fi
-
-sbt $SBTOPTS "++$TRAVIS_SCALA_VERSION" "$publishVersion" "$projectPrefix/update"  "$projectPrefix/compile" "$projectPrefix/test" "$projectPrefix/publishLocal" "$publishTask"
+sbt "++$TRAVIS_SCALA_VERSION" "$publishVersion" "$projectPrefix/update"  "$projectPrefix/compile" "$projectPrefix/test" "$projectPrefix/publishLocal" "$publishTask"