[DOCS] Remove outdated OSS homebrew tap (#73688)

With
elastic/homebrew-tap@230b860,
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removes outdated references to the tap from our docs.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.

Author: jrodewig

docs/reference/setup/install/brew.asciidoc

@@ -13,16 +13,13 @@ brew tap elastic/tap
 -------------------------
 
 Once you've tapped the Elastic Homebrew repo, you can use `brew install` to
-install the default distribution of {es}:
+install the **latest version** of {es}:
 
 [source,sh]
 -------------------------
 brew install elastic/tap/elasticsearch-full
 -------------------------
 
-This installs the most recently released default distribution of {es}.
-To install the OSS distribution, specify `elastic/tap/elasticsearch-oss`.
-
 [[brew-layout]]
 ==== Directory layout for Homebrew installs