Remove redundant headers of PR template

[RossKen]

---

name: 'Feature request'
about: Making a change to Splink
title: '<title>'
assignees: ''

Type of PR

• BUG
• FEAT
• MAINT
• DOC

Is your Pull Request linked to an existing Issue or Pull Request?

Give a brief description for the solution you have provided

PR Checklist

• Added documentation for changes
• Added feature to example notebooks at tutorials in splink_demos (if appropriate)
• Added tests (if appropriate)
• Made changes based off the latest version of Splink
• Run the linter

[github-actions]

Test: test_2_rounds_1k_duckdb

Percentage change: -31.2%

	date	time	stats_mean	stats_min	commit_info_branch	commit_info_id	machine_info_cpu_brand_raw	machine_info_cpu_hz_actual_friendly	commit_hash
849	2022-07-12	18:40:05	1.89098	1.87463	splink3	c334bb9	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	2.7934 GHz	c334bb9
1749	2023-06-21	08:07:48	1.29386	1.29023	(detached head)	cf33041	Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz	2.5939 GHz	cf33041

Test: test_2_rounds_1k_sqlite

Percentage change: -16.9%

	date	time	stats_mean	stats_min	commit_info_branch	commit_info_id	machine_info_cpu_brand_raw	machine_info_cpu_hz_actual_friendly	commit_hash
851	2022-07-12	18:40:05	4.32179	4.25898	splink3	c334bb9	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	2.7934 GHz	c334bb9
1751	2023-06-21	08:07:48	3.53836	3.53801	(detached head)	cf33041	Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz	2.5939 GHz	cf33041

Click here for vega lite time series charts

[ADBond]

👍