Remove unused generation script (#5491)

The old android-petstore.sh script is writing output to the android volley
directory. There is a new script called android-petstore-volley.sh that also
writes to that same directory. They overwrite each other, which makes the
run-all-petstore script output dependent on which one gets run last. This change
removes the old script.

bin/android-petstore.sh

@@ -1,31 +0,0 @@
-#!/bin/sh
-
-SCRIPT="$0"
-
-while [ -h "$SCRIPT" ] ; do
-  ls=`ls -ld "$SCRIPT"`
-  link=`expr "$ls" : '.*-> \(.*\)$'`
-  if expr "$link" : '/.*' > /dev/null; then
-    SCRIPT="$link"
-  else
-    SCRIPT=`dirname "$SCRIPT"`/"$link"
-  fi
-done
-
-if [ ! -d "${APP_DIR}" ]; then
-  APP_DIR=`dirname "$SCRIPT"`/..
-  APP_DIR=`cd "${APP_DIR}"; pwd`
-fi
-
-executable="./modules/swagger-codegen-cli/target/swagger-codegen-cli.jar"
-
-if [ ! -f "$executable" ]
-then
-  mvn clean package
-fi
-
-# if you've executed sbt assembly previously it will use that instead.
-export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore.json -l android -o samples/client/petstore/android/volley"
-
-java $JAVA_OPTS -jar $executable $ags