diff --git a/build.sh b/build.sh
index 1e149c2badcfa..b314beca93038 100755
--- a/build.sh
+++ b/build.sh
@@ -85,10 +85,6 @@ echo "Using Python executable $PYTHON_EXECUTABLE."
 BAZEL_EXECUTABLE=$(PATH="$PATH:$HOME/.bazel/bin" which bazel)
 echo "Using Bazel executable $BAZEL_EXECUTABLE."
 
-RAY_BUILD_PYTHON=$RAY_BUILD_PYTHON \
-RAY_BUILD_JAVA=$RAY_BUILD_JAVA \
-bash "$ROOT_DIR/setup_thirdparty.sh" "$PYTHON_EXECUTABLE"
-
 # Now we build everything.
 BUILD_DIR="$ROOT_DIR/build/"
 if [ ! -d "${BUILD_DIR}" ]; then
diff --git a/setup_thirdparty.sh b/setup_thirdparty.sh
deleted file mode 100755
index 6e6e615c21cab..0000000000000
--- a/setup_thirdparty.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-set -x
-
-# Cause the script to exit if a single command fails.
-set -e
-
-ROOT_DIR=$(cd "$(dirname "${BASH_SOURCE:-$0}")"; pwd)
-
-if [[ -z  "$1" ]]; then
-  PYTHON_EXECUTABLE=$(which python)
-else
-  PYTHON_EXECUTABLE=$1
-fi
-echo "Using Python executable $PYTHON_EXECUTABLE."
-
-RAY_BUILD_PYTHON=$RAY_BUILD_PYTHON \
-RAY_BUILD_JAVA=$RAY_BUILD_JAVA \
-"$ROOT_DIR/thirdparty/scripts/setup.sh" "$PYTHON_EXECUTABLE"
diff --git a/thirdparty/scripts/setup.sh b/thirdparty/scripts/setup.sh
deleted file mode 100755
index a6492f0df0180..0000000000000
--- a/thirdparty/scripts/setup.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/bash
-
-set -x
-
-# Cause the script to exit if a single command fails.
-set -e
-
-TP_SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE:-$0}")"; pwd)
-TP_DIR=$TP_SCRIPT_DIR/..
-
-mkdir -p $TP_DIR/build
-mkdir -p $TP_DIR/pkg
-
-if [[ -z  "$1" ]]; then
-  PYTHON_EXECUTABLE=`which python`
-else
-  PYTHON_EXECUTABLE=$1
-fi
-echo "Using Python executable $PYTHON_EXECUTABLE."
-
-if [[ "$RAY_BUILD_JAVA" == "YES" ]]; then
-echo "Java library will be built."
-fi
-if [[ "$RAY_BUILD_PYTHON" == "YES" ]]; then
-echo "Python library will be built."
-fi
-
-unamestr="$(uname)"