Removing LANG env var from 3.10-rc and templates

Author: henryh9n

3.10-rc/alpine3.12/Dockerfile

@@ -9,10 +9,6 @@ FROM alpine:3.12
 # ensure local python is preferred over distribution python
 ENV PATH /usr/local/bin:$PATH
 
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
 # runtime dependencies
 RUN set -eux; \
 	apk add --no-cache \

3.10-rc/buster/Dockerfile

@@ -9,10 +9,6 @@ FROM buildpack-deps:buster
 # ensure local python is preferred over distribution python
 ENV PATH /usr/local/bin:$PATH
 
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
 # extra dependencies (over what buildpack-deps already includes)
 RUN apt-get update && apt-get install -y --no-install-recommends \
 		libbluetooth-dev \

3.10-rc/buster/slim/Dockerfile

@@ -9,10 +9,6 @@ FROM debian:buster-slim
 # ensure local python is preferred over distribution python
 ENV PATH /usr/local/bin:$PATH
 
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
 # runtime dependencies
 RUN set -eux; \
 	apt-get update; \

Dockerfile-alpine.template

@@ -3,10 +3,6 @@ FROM alpine:%%PLACEHOLDER%%
 # ensure local python is preferred over distribution python
 ENV PATH /usr/local/bin:$PATH
 
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
 # runtime dependencies
 RUN set -eux; \
 	apk add --no-cache \

Dockerfile-debian.template

@@ -3,10 +3,6 @@ FROM buildpack-deps:%%PLACEHOLDER%%
 # ensure local python is preferred over distribution python
 ENV PATH /usr/local/bin:$PATH
 
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
 # extra dependencies (over what buildpack-deps already includes)
 RUN apt-get update && apt-get install -y --no-install-recommends \
 		libbluetooth-dev \

Dockerfile-slim.template

@@ -3,10 +3,6 @@ FROM debian:%%PLACEHOLDER%%
 # ensure local python is preferred over distribution python
 ENV PATH /usr/local/bin:$PATH
 
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
 # runtime dependencies
 RUN set -eux; \
 	apt-get update; \