Fix: redundant maintenance template & horizontal rule

- Removed `Maintenance Template` template which was a template... used to make other templates... but is now redundant.
- Removed horizontal rule after H3 section in `Maintenance Templates.md`

Author: MasssiveJuice08

content/MMW Design & Planning/Maintenance Templates.md

@@ -101,8 +101,6 @@ Identifying inconsistent and contradictory information.
 
 ![[Article Contradicts Itself#^e5f461]]
 
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 ### Deletion
 
 For articles, categories (folders), or tags considered for deletion.