Backed out 7 changesets (bug 1387862) for yaml linting failures.

Backed out changeset 63f87f6db7d6 (bug 1387862)
Backed out changeset a85b7e7d9f24 (bug 1387862)
Backed out changeset 3713ea9672e8 (bug 1387862)
Backed out changeset 22c1094e387f (bug 1387862)
Backed out changeset e0bfb35b0eec (bug 1387862)
Backed out changeset 5bb5dc7655ec (bug 1387862)
Backed out changeset cc4c01794114 (bug 1387862)

.cron.yml

@@ -2,8 +2,6 @@
 # `taskcluster/taskgraph/cron/schema.py`.  For documentation, see
 # `taskcluster/docs/cron.rst`.
 
----
-
 jobs:
     - name: nightly-desktop
       job:
@@ -15,10 +13,10 @@ jobs:
           - date
       when:
           by-project:
-              # Match buildbot starts for now
-              date: [{hour: 15, minute: 0}]
-              mozilla-central: [{hour: 10, minute: 0}]
-              # No default
+            # Match buildbot starts for now
+            date: [{hour: 15, minute: 0}]
+            mozilla-central: [{hour: 10, minute: 0}]
+            # No default
 
     - name: nightly-desktop-linux
       job:
@@ -28,7 +26,7 @@ jobs:
       run-on-projects:
           - mozilla-central
           - date
-      when: []  # never (hook only)
+      when: [] # never (hook only)
 
     - name: nightly-desktop-osx
       job:
@@ -38,7 +36,7 @@ jobs:
       run-on-projects:
           - mozilla-central
           - date
-      when: []  # never (hook only)
+      when: [] # never (hook only)
 
     - name: nightly-desktop-win32
       job:
@@ -58,7 +56,7 @@ jobs:
       run-on-projects:
           - mozilla-central
           - date
-      when: []  # never (hook only)
+      when: [] # never (hook only)
 
     - name: nightly-android
       job:
@@ -69,11 +67,11 @@ jobs:
           - mozilla-central
           - date
       when:
-          by-project:
-              # Match buildbot starts for now
-              date: [{hour: 15, minute: 0}]
-              mozilla-central: [{hour: 10, minute: 0}]
-              # No default
+        by-project:
+            # Match buildbot starts for now
+            date: [{hour: 15, minute: 0}]
+            mozilla-central: [{hour: 10, minute: 0}]
+            # No default
 
     - name: nightly-mochitest-valgrind
       job:
@@ -95,5 +93,5 @@ jobs:
           - mozilla-central
       when:
           by-project:
-              mozilla-central: [{hour: 10, minute: 0}]
-              # No default
+            mozilla-central: [{hour: 10, minute: 0}]
+            # No default

python/mozlint/test/linters/badreturncode.yml

@@ -1,4 +1,3 @@
----
 BadReturnCodeLinter:
     description: Returns an error code no matter what
     include:

python/mozlint/test/linters/explicit_path.yml

@@ -1,4 +1,3 @@
----
 ExplicitPathLinter:
     description: Only lint a specific file name
     rule: no-foobar

python/mozlint/test/linters/external.yml

@@ -1,4 +1,3 @@
----
 ExternalLinter:
     description: It's bad to have the string foobar in js files.
     include:

python/mozlint/test/linters/invalid_exclude.yml

@@ -1,4 +1,3 @@
----
 BadExcludeLinter:
     description: Has an invalid exclude directive.
     exclude: [0, 1]  # should be a list of strings

python/mozlint/test/linters/invalid_extension.ym

@@ -1,4 +1,3 @@
----
 BadExtensionLinter:
     description: Has an invalid file extension.
     type: string

python/mozlint/test/linters/invalid_include.yml

@@ -1,4 +1,3 @@
----
 BadIncludeLinter:
     description: Has an invalid include directive.
     include: should be a list

python/mozlint/test/linters/invalid_type.yml

@@ -1,4 +1,3 @@
----
 BadTypeLinter:
     description: Has an invalid type.
     type: invalid

python/mozlint/test/linters/missing_attrs.yml

@@ -1,3 +1,2 @@
----
 MissingAttrsLinter:
     description: Missing type and payload

python/mozlint/test/linters/raises.yml

@@ -1,4 +1,3 @@
----
 RaisesLinter:
     description: Raises an exception
     type: external

python/mozlint/test/linters/regex.yml

@@ -1,8 +1,5 @@
----
 RegexLinter:
-    description: >-
-        Make sure the string foobar never appears in a js variable
-        file because it is bad.
+    description: Make sure the string foobar never appears in a js variable file because it is bad.
     rule: no-foobar
     include:
         - '**/*.js'

python/mozlint/test/linters/string.yml

@@ -1,8 +1,5 @@
----
 StringLinter:
-    description: >-
-        Make sure the string foobar never appears in browser js
-        files because it is bad
+    description: Make sure the string foobar never appears in browser js files because it is bad
     rule: no-foobar
     include:
         - '**/*.js'

python/mozlint/test/linters/structured.yml

@@ -1,4 +1,3 @@
----
 StructuredLinter:
     description: "It's bad to have the string foobar in js files."
     include:

taskcluster/ci/source-test/mozlint.yml

@@ -57,28 +57,6 @@ mozlint-flake8:
             - 'python/mozlint/**'
             - 'tools/lint/**'
 
-mozlint-yaml:
-    description: yamllint run over the gecko codebase
-    platform: lint/opt
-    treeherder:
-        symbol: yaml
-        kind: test
-        tier: 1
-    worker-type: aws-provisioner-v1/gecko-t-linux-xlarge
-    worker:
-        docker-image: {in-tree: "lint"}
-        max-run-time: 1800
-    run:
-        using: mach
-        mach: lint -l yamllint -f treeherder
-    when:
-        files-changed:
-            - '**/*.yml'
-            - '**/*.yaml'
-            - '**/.ymllint'
-            - 'python/mozlint/**'
-            - 'tools/lint/**'
-
 wptlint-gecko:
     description: web-platform-tests linter
     platform: lint/opt

tools/lint/eslint.yml

@@ -1,4 +1,3 @@
----
 eslint:
     description: JavaScript linter
     # ESLint infra handles its own path filtering, so just include cwd

tools/lint/flake8.yml

@@ -1,4 +1,3 @@
----
 flake8:
     description: Python linter
     include:

tools/lint/wpt.yml

@@ -1,4 +1,3 @@
----
 wpt:
     description: web-platform-tests lint
     include:

tools/lint/wpt_manifest.yml

@@ -1,4 +1,3 @@
----
 wpt_manifest:
     description: web-platform-tests manifest lint
     include: