diff --git a/Library/Homebrew/cask/installer.rb b/Library/Homebrew/cask/installer.rb
index 45383d30ec728..494193a252bc2 100644
--- a/Library/Homebrew/cask/installer.rb
+++ b/Library/Homebrew/cask/installer.rb
@@ -127,11 +127,12 @@ def install
 
     def check_deprecate_disable
       deprecate_disable_type = DeprecateDisable.type(@cask)
-      return if deprecate_disable_type.blank?
+      return if deprecate_disable_type.nil?
 
-      if deprecate_disable_type == :deprecated
+      case deprecate_disable_type
+      when :deprecated
         opoo "#{@cask.token} has been #{DeprecateDisable.message(@cask)}"
-      elsif deprecate_disable_type == :disabled
+      when :disabled
         raise CaskCannotBeInstalledError.new(@cask, DeprecateDisable.message(@cask))
       end
     end
diff --git a/Library/Homebrew/deprecate_disable.rb b/Library/Homebrew/deprecate_disable.rb
index adc3801cfa70e..55d6a24add6a9 100644
--- a/Library/Homebrew/deprecate_disable.rb
+++ b/Library/Homebrew/deprecate_disable.rb
@@ -7,11 +7,6 @@
 module DeprecateDisable
   module_function
 
-  SHARED_DEPRECATE_DISABLE_REASONS = {
-    repo_archived: "has an archived upstream repository",
-    repo_removed:  "has a removed upstream repository",
-  }.freeze
-
   FORMULA_DEPRECATE_DISABLE_REASONS = {
     does_not_build:      "does not build",
     no_license:          "has no license",
@@ -25,19 +20,16 @@ module DeprecateDisable
                          "a different checksum than the current one. " \
                          "Upstream's repository might have been compromised. " \
                          "We can re-package this once upstream has confirmed that they retagged their release",
-    **SHARED_DEPRECATE_DISABLE_REASONS,
   }.freeze
 
   CASK_DEPRECATE_DISABLE_REASONS = {
-    discontinued:      "is discontinued upstream",
-    unsigned_artifact: "has an unsigned binary which prevents it from running on Apple Silicon devices " \
-                       "under standard macOS security policy",
-    **SHARED_DEPRECATE_DISABLE_REASONS,
+    discontinued: "is discontinued upstream",
   }.freeze
 
   def type(formula_or_cask)
     return :deprecated if formula_or_cask.deprecated?
-    return :disabled if formula_or_cask.disabled?
+
+    :disabled if formula_or_cask.disabled?
   end
 
   def message(formula_or_cask)
diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index 9b46b15d02e8f..dd8a0e450ec89 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -204,9 +204,10 @@ def prelude
     if deprecate_disable_type.present?
       message = "#{formula.full_name} has been #{DeprecateDisable.message(formula)}"
 
-      if deprecate_disable_type == :deprecated
+      case deprecate_disable_type
+      when :deprecated
         opoo message
-      elsif deprecate_disable_type == :disabled
+      when :disabled
         raise CannotInstallFormulaError, message
       end
     end