Swap annotation key to actions.github.com prefix (#216)

src/utilities/workflowAnnotationUtils.test.ts

@@ -1,24 +1,6 @@
-import {
-   cleanLabel,
-   prefixObjectKeys
-} from '../utilities/workflowAnnotationUtils'
+import {cleanLabel} from '../utilities/workflowAnnotationUtils'
 
 describe('WorkflowAnnotationUtils', () => {
-   describe('prefixObjectKeys', () => {
-      it('should prefix an object with a given prefix', () => {
-         const obj = {
-            foo: 'bar',
-            baz: 'qux'
-         }
-         const prefix = 'prefix.'
-         const expected = {
-            'prefix.foo': 'bar',
-            'prefix.baz': 'qux'
-         }
-         expect(prefixObjectKeys(obj, prefix)).toEqual(expected)
-      })
-   })
-
    describe('cleanLabel', () => {
       it('should clean label', () => {
          const alreadyClean = 'alreadyClean'