Remove temporary addition of PPA

Author: dev-dull

Dockerfile

@@ -5,11 +5,6 @@ ENV PTBT_USER="tfbackendsvc"
 COPY . "${PTBT_WORKDIR}"
 RUN mkdir "${PTBT_DATADIR}"
 
-# Patch for Git CVE - remove when git version >= 2.39
-RUN apt-get update
-RUN apt install software-properties-common -y
-RUN add-apt-repository ppa:git-core/ppa -y
-
 RUN apt-get update
 RUN apt-get dist-upgrade -y
 RUN apt-get install python3 python3-pip python3-setuptools net-tools openssh-client sudo git -y