Revert "Install gcc-10 (#5450)"

This reverts commit 65b7639.

Author: will-cromar

infra/ansible/e2e_tests.Dockerfile

@@ -3,10 +3,6 @@ ARG debian_version=buster
 
 FROM python:${python_version}-${debian_version} AS build
 
-RUN echo 'deb http://deb.debian.org/debian bullseye main' >> /etc/apt/sources.list
-RUN apt-get update
-RUN apt-get install -y gcc-10
-
 WORKDIR /ansible
 RUN pip install ansible
 COPY . /ansible
@@ -39,4 +35,4 @@ RUN pip install *.whl
 WORKDIR /
 
 # Clean-up unused directories.
-RUN rm -rf /ansible /tmp/wheels
+RUN rm -rf /ansible /tmp/wheels