remove old dependency versions set to be ignored by dependabot, use 'directories' for folders

.github/dependabot.yml

@@ -1,75 +1,11 @@
 version: 2
 updates:
 - package-ecosystem: pip
-  directory: "/"
+  directories:
+    - "/"
+    - "/requirements"
   schedule:
     interval: daily
   open-pull-requests-limit: 99
   labels:
   - dependencies
-  - python
-- package-ecosystem: pip
-  directory: "/requirements"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 99
-  reviewers:
-  - sarah-clements
-  labels:
-  - dependencies
-  - python
-  allow:
-  - dependency-name: django
-  ignore:
-  - dependency-name: jinja2
-    versions:
-    - 2.11.3
-  - dependency-name: taskcluster
-    versions:
-    - 41.0.0
-    - 41.0.1
-    - 41.0.2
-    - 41.1.0
-    - 42.1.0
-  - dependency-name: django-debug-toolbar
-    versions:
-    - "3.2"
-  - dependency-name: pre-commit
-    versions:
-    - 2.10.0
-    - 2.10.1
-    - 2.11.0
-  - dependency-name: django-cache-memoize
-    versions:
-    - 0.1.8
-  - dependency-name: aiohttp
-    versions:
-    - 3.7.4
-  - dependency-name: newrelic
-    versions:
-    - 6.0.1.155
-    - 6.2.0.156
-  - dependency-name: django
-    versions:
-    - 3.1.5
-    - 3.1.6
-    - 3.1.7
-  - dependency-name: django-extensions
-    versions:
-    - 3.1.1
-  - dependency-name: mozci
-    versions:
-    - 1.12.5
-    - 1.12.6
-  - dependency-name: django-cors-headers
-    versions:
-    - 3.7.0
-  - dependency-name: pyyaml
-    versions:
-    - 5.4.1
-  - dependency-name: pip-tools
-    versions:
-    - 5.5.0
-  - dependency-name: json-e
-    versions:
-    - 4.3.0