Commit049a779

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docs: remove outdated note about unique indexes

Patch by Josh KupershmidtBackpatch through 9.5

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Original file line number	Diff line number	Diff line change
`@@ -655,11 +655,7 @@ CREATE UNIQUE INDEX <replaceable>name</replaceable> ON <replaceable>table</repla`
`655`	`655`
`656`	`656`	`<note>`
`657`	`657`	`<para>`
`658`		`- The preferred way to add a unique constraint to a table is`
`659`		`- <literal>ALTER TABLE ... ADD CONSTRAINT</literal>. The use of`
`660`		`- indexes to enforce unique constraints could be considered an`
`661`		`- implementation detail that should not be accessed directly.`
`662`		`- One should, however, be aware that there's no need to manually`
	`658`	`+ There's no need to manually`
`663`	`659`	`create indexes on unique columns; doing so would just duplicate`
`664`	`660`	`the automatically-created index.`
`665`	`661`	`</para>`

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