doc: remove "note that" from CPP_STYLE_GUIDE.md

Refs: nodejs/remark-preset-lint-node#16

PR-URL: nodejs#28329
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

CPP_STYLE_GUIDE.md

@@ -326,7 +326,7 @@ When there is a need to throw errors from a C++ binding method, try to
 return the data necessary for constructing the errors to JavaScript,
 then construct and throw the errors [using `lib/internal/errors.js`][errors].
 
-Note that in general, type-checks on arguments should be done in JavaScript
+In general, type-checks on arguments should be done in JavaScript
 before the arguments are passed into C++. Then in the C++ binding, simply using
 `CHECK` assertions to guard against invalid arguments should be enough.