Remove attributes for latest version of vale

vale/styles/Buildkite/eg.yml

@@ -1,8 +1,7 @@
 extends: existence
 message: Consider replacing '%s' with 'for example'
 level: warning
-code: false
 ignorecase: true
 tokens:
   - '\be\.g\b'
-  - '\be\.g.\b'
+  - '\be\.g.\b'

vale/styles/Buildkite/etc.yml

@@ -1,7 +1,6 @@
 extends: existence
 message: Consider replacing '%s' with 'and so on'
 level: warning
-code: false
 ignorecase: true
 tokens:
-  - '\betc\.\b'
+  - '\betc\.\b'

vale/styles/Buildkite/ie.yml

@@ -1,8 +1,7 @@
 extends: existence
 message: Consider replacing '%s' with 'in other words'
 level: warning
-code: false
 ignorecase: true
 tokens:
   - '\bi\.e\b'
-  - '\bi\.e.\b'
+  - '\bi\.e.\b'

vale/styles/Buildkite/via.yml

@@ -1,7 +1,6 @@
 extends: existence
 message: Consider replacing '%s' with 'using'
 level: warning
-code: false
 ignorecase: true
 tokens:
-  - '\bvia\b'
+  - '\bvia\b'