Cleanup various TODOs

These were also easily fixed, already fixed or incorrect and
non-controversial.

Co-authored-by: Issy Long <issyl0@github.com>

Library/.rubocop.yml

@@ -164,7 +164,6 @@ Naming/HeredocDelimiterNaming:
 Naming/InclusiveLanguage:
   CheckStrings: true
   FlaggedTerms:
-    # TODO: If possible, make this stricter.
     slave:
       AllowedRegex:
         - "gitslave" # Used in formula `gitslave`
@@ -392,12 +391,12 @@ Style/NumericLiterals:
   Exclude:
     - "**/Brewfile"
 
-# TODO: These are pre-existing violations and should be corrected
-#   to define methods so that call sites can be type-checked.
 Style/OpenStructUse:
   Exclude:
-    - "Homebrew/cli/args.rb"
     - "Taps/**/*.rb"
+    # TODO: This is a pre-existing violation and should be corrected
+    #   to define methods so that call sites can be type-checked.
+    - "Homebrew/cli/args.rb"
 
 # Rescuing `StandardError` is an understood default.
 Style/RescueStandardError:

Library/Homebrew/cmd/fetch.rb

@@ -116,7 +116,6 @@ module Homebrew
               begin
                 formula.clear_cache if args.force?
 
-                # TODO: Deprecate `--bottle-tag`.
                 bottle_tag = if (bottle_tag = args.bottle_tag&.to_sym)
                   Utils::Bottles::Tag.from_symbol(bottle_tag)
                 else

Library/Homebrew/download_strategy.rb

@@ -74,14 +74,22 @@ class AbstractDownloadStrategy
 
   # Disable any output during downloading.
   #
-  # TODO: Deprecate once we have an explicitly documented alternative.
-  #
   # @api public
   sig { void }
-  def shutup!
+  def quiet!
     @quiet = true
   end
 
+  # Disable any output during downloading.
+  #
+  # @deprecated
+  # @api private
+  sig { void }
+  def shutup!
+    # odeprecated "AbstractDownloadStrategy#shutup!", "AbstractDownloadStrategy#quiet!"
+    quiet!
+  end
+
   def quiet?
     Context.current.quiet? || @quiet
   end