compliance_test: unset HOMEBREW_DEVELOPER to avoid deprecation errors

Library/Homebrew/cask/test/Casks/compliance_test.rb

@@ -1,6 +1,7 @@
 require 'test_helper'
 
 describe "Casks" do
+  with_environment "HOMEBREW_DEVELOPER" => nil do
     Hbc.all.reject {|c| c.is_a?(Hbc::TestCask) }.each do |cask|
       describe "#{cask}" do
         it "passes audit" do
@@ -12,3 +13,4 @@ describe "Casks" do
       end
     end
   end
+end

Library/Homebrew/cask/test/test_helper.rb

@@ -17,7 +17,9 @@ require "global"
 # add Homebrew-Cask to load path
 $LOAD_PATH.push(project_root.join("lib").to_s)
 
+require "test/helper/env"
 require "test/helper/shutup"
+include Test::Helper::Env
 include Test::Helper::Shutup
 
 def sudo(*args)