workflow: report bug rework

Author: 0xc0170

docs/reference/contributing/guidelines/workflow.md

@@ -46,12 +46,10 @@ Please create separate pull requests for each concern; each pull request should
 
 ##### Reporting bugs
 
-Before submitting a bug report or a bug fix, please [discuss it on the forums](https://os.mbed.com/forum/bugs-suggestions/) to avoid duplication of work, as we or others might be working on it already.
+All Mbed OS bugs should be submitted [on the forums](https://os.mbed.com/forum/bugs-suggestions/).
 
 The bug report should be reproducable (fails for others)  and specific (where and how it fails). Insufficient bug reports will be closed.
 
-All Mbed OS is on GitHub; please use GitHub's [issues mechanism](https://guides.github.com/features/issues/) to open a bug report directly against the relevant GitHub repository.
-
 #### Guidelines for GitHub pull requests
 
 Pull requests on GitHub have to meet the following requirements to keep the code and commit history clean: