chore: remove DJANGO_VERSION (#20690)

.github/workflows/acceptance.yml

@@ -100,9 +100,6 @@ jobs:
         SENTRY_SKIP_BACKEND_VALIDATION: 1
         MIGRATIONS_TEST_MIGRATE: 0
 
-        # Use this to override the django version in the requirements file.
-        DJANGO_VERSION: ">=1.11,<1.12"
-
         # Node configuration
         NODE_OPTIONS: --max-old-space-size=4096
         NODE_ENV: development

.github/workflows/migrations.yml

@@ -18,9 +18,6 @@ jobs:
         # The hostname used to communicate with the PostgreSQL from sentry
         DATABASE_URL: postgresql://postgres:postgres@localhost/sentry
 
-        # Use this to override the django version in the requirements file.
-        DJANGO_VERSION: ">=1.11,<1.12"
-
       services:
         postgres:
           image: postgres:9.6

.github/workflows/python.yml

@@ -20,9 +20,6 @@ jobs:
       # The hostname used to communicate with the PostgreSQL from sentry
       DATABASE_URL: postgresql://postgres:postgres@localhost/sentry
 
-      # Use this to override the django version in the requirements file.
-      DJANGO_VERSION: ">=1.11,<1.12"
-
     services:
       postgres:
         image: postgres:9.6
@@ -122,9 +119,6 @@ jobs:
       SENTRY_LIGHT_BUILD: 1
       SENTRY_SKIP_BACKEND_VALIDATION: 1
 
-      # Use this to override the django version in the requirements file.
-      DJANGO_VERSION: ">=1.11,<1.12"
-
       PYTEST_SENTRY_DSN: https://6fd5cfea2d4d46b182ad214ac7810508@sentry.io/2423079
       # XXX(py3): Reruns are disabled for until all tests are passing.
       PYTEST_ADDOPTS: ""

.travis.yml

@@ -30,8 +30,6 @@ env:
     - SENTRY_LIGHT_BUILD=1
     - SENTRY_SKIP_BACKEND_VALIDATION=1
     - MIGRATIONS_TEST_MIGRATE=0
-    # Use this to override the django version in the requirements file.
-    - DJANGO_VERSION=">=1.11,<1.12"
     - VOLTA_VERSION=0.8.1
     - VOLTA_HOME="${HOME}/.volta"
     - PATH="${HOME}/.volta/bin:${PATH}"

setup.py

@@ -40,14 +40,6 @@ def get_requirements(env):
 install_requires = get_requirements("base")
 dev_requires = get_requirements("dev")
 
-# override django version in requirements file if DJANGO_VERSION is set
-DJANGO_VERSION = os.environ.get("DJANGO_VERSION")
-if DJANGO_VERSION:
-    install_requires = [
-        u"Django{}".format(DJANGO_VERSION) if r.startswith("Django>=") else r
-        for r in install_requires
-    ]
-
 
 class SentrySDistCommand(SDistCommand):
     # If we are not a light build we want to also execute build_assets as