chore: remove the COPY instruction in .devcontainer/Dockerfile (#3409)

.devcontainer/Dockerfile

@@ -1,8 +1,5 @@
 FROM mcr.microsoft.com/devcontainers/python:3.10
 
-COPY . .
-
-
 # [Optional] Uncomment this section to install additional OS packages.
 # RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 #     && apt-get -y install --no-install-recommends <your-package-list-here>