removing uneeded files

docker-scripts/linux/install-node.sh

@@ -1,8 +0,0 @@
-#!/bin/sh
-
-export NODE_DOWNLOAD_SHA 0e20787e2eda4cc31336d8327556ebc7417e8ee0a6ba0de96a09b0ec2b841f60
-curl -SL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.gz" --output nodejs.tar.gz \
-    && echo "$NODE_DOWNLOAD_SHA nodejs.tar.gz" | sha256sum -c - \
-    && tar -xzf "nodejs.tar.gz" -C /usr/local --strip-components=1 \
-    && rm nodejs.tar.gz \
-    && ln -s /usr/local/bin/node /usr/local/bin/nodejs

docker-scripts/win/install-node.cmd

@@ -1,4 +0,0 @@
-set NODE_VERSION=8.11.1
-curl -SL "https://nodejs.org/dist/v%NODE_VERSION%/node-v%NODE_VERSION%-win-x64.zip" --output nodejs.zip
-tar -xf nodejs.zip  -C c:\
-setx PATH "%PATH%;c:\node-v%NODE_VERSION%-win-x64"