[DOCS] Remove outdated OSS homebrew tap (#73688) (#73694)

With
https://github.com/elastic/homebrew-tap/commit/230b860d950877341c9be81d3ddc378e77ee8263,
the `elastic/tap/elasticsearch-oss` tap was removed from Homebrew. This
removes outdated references to the tap from our docs.

It also notes that Homebrew installs the latest version of Elasticsearch.

docs/reference/setup/install/brew.asciidoc

@@ -13,15 +13,13 @@ brew tap elastic/tap
 -------------------------
 
 Once you've tapped the Elastic Homebrew repo, you can use `brew install` to
-install {es}:
+install the **latest version** of {es}:
 
 [source,sh]
 -------------------------
 brew install elastic/tap/elasticsearch-full
 -------------------------
 
-This installs the most recently released distribution of {es}.
-
 [[brew-layout]]
 ==== Directory layout for Homebrew installs