Remove settings from Dockerfile, now in devcontainer.json

.devcontainer/Dockerfile

@@ -5,9 +5,6 @@
 
 FROM maven:3.6-jdk-8
 
-# Copy endpoint specific user settings overrides into container to specify Java path
-COPY settings.vscode.json /root/.vscode-remote/data/Machine/settings.json
-
 # Configure apt
 ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update \

.devcontainer/settings.vscode.json

@@ -1,3 +0,0 @@
-{
-    "java.home": "/docker-java-home"
-}