Move the Reminder section of PR template to PR-Etiquette document (#279)

# Summary

The reminder section of the PR template is supposed to be removed before
merging the PR but we forget removing that most of the time and because
of that we see that in the commit logs in master.
And it also makes sense for that to be in the PR Etiquette document.
That's why this PR removes that section from PR template and moves it to
the PR Etiquette
[document](https://docs.google.com/document/d/1T93KUtdvONq43vfTfUt8l92uo4e4SEEvFbIEKOxGr44/edit?tab=t.0#heading=h.f26xqmssh372).

## Proof of Work

NA

## Checklist
- [x] Have you linked a jira ticket and/or is the ticket in the title?
- [x] Have you checked whether your jira ticket required DOCSP changes?
- [x] Have you checked for release_note changes?

Author: viveksinghggits

.github/pull_request_template.md

@@ -10,14 +10,3 @@
 - [ ] Have you linked a jira ticket and/or is the ticket in the title?
 - [ ] Have you checked whether your jira ticket required DOCSP changes?
 - [ ] Have you checked for release_note changes?
-
-## Reminder (Please remove this when merging)
-- Please try to Approve or Reject Changes the PR, keep PRs in review as short as possible
-- Our Short Guide for PRs: [Link](https://docs.google.com/document/d/1T93KUtdvONq43vfTfUt8l92uo4e4SEEvFbIEKOxGr44/edit?tab=t.0)
-- Remember the following Communication Standards - use comment prefixes for clarity:
-  * **blocking**: Must be addressed before approval.
-  * **follow-up**: Can be addressed in a later PR or ticket.
-  * **q**: Clarifying question.
-  * **nit**: Non-blocking suggestions.
-  * **note**: Side-note, non-actionable. Example: Praise 
-  * --> no prefix is considered a question