remove old travis scripts

scripts/travis/install.sh

-#!/bin/bash
-
-# Installs Elasticsearch
-#
-# Requires ESVER environment variable to be set.
-
-set -e
-
-if [[ $ESVER == "-" ]];
-then
-    exit 0
-fi
-
-echo "Installing ElasticSearch $ESVER" >&2
-wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-$ESVER.tar.gz
-tar xzvf elasticsearch-$ESVER.tar.gz

scripts/travis/setup.sh

-#!/bin/bash
-
-# Runs Elasticsearch
-#
-# Requires ESVER environment variable to be set.
-# cwd is the git repository root.
-
-set -e
-
-if [[ $ESVER == "-" ]];
-then
-    exit 0
-fi
-
-echo "Starting ElasticSearch $ESVER" >&2
-pushd elasticsearch-$ESVER
-    # Elasticsearch 0.90 daemonizes automatically, but 1.0+ requires
-    # a -d argument.
-
-    if [[ $ESVER == 0* ]];
-    then
-        ./bin/elasticsearch
-    else
-        echo "launching with -d option." >&2
-        ./bin/elasticsearch -d
-        pip install elasticsearch==1.3.0
-    fi
-popd