Removed SPARK_MEM from run-examples.

bin/run-example

@@ -64,10 +64,6 @@ if $cygwin; then
     export SPARK_EXAMPLES_JAR=`cygpath -w $SPARK_EXAMPLES_JAR`
 fi
 
-# Set SPARK_MEM if it isn't already set since we also use it for this process
-SPARK_MEM=${SPARK_MEM:-512m}
-export SPARK_MEM
-
 # Find java binary
 if [ -n "${JAVA_HOME}" ]; then
   RUNNER="${JAVA_HOME}/bin/java"
@@ -83,7 +79,6 @@ fi
 # Set JAVA_OPTS to be able to load native libraries and to set heap size
 JAVA_OPTS="$SPARK_JAVA_OPTS"
 JAVA_OPTS="$JAVA_OPTS -Djava.library.path=$SPARK_LIBRARY_PATH"
-JAVA_OPTS="$JAVA_OPTS -Xms$SPARK_MEM -Xmx$SPARK_MEM"
 # Load extra JAVA_OPTS from conf/java-opts, if it exists
 if [ -e "$FWDIR/conf/java-opts" ] ; then
   JAVA_OPTS="$JAVA_OPTS `cat $FWDIR/conf/java-opts`"