Delete with_environment from cask tests.

Library/Homebrew/cask/spec/cask/cli_spec.rb

@@ -39,17 +39,17 @@ describe Hbc::CLI do
     end
 
     it "respects the env variable when choosing what appdir to create" do
-      with_environment "HOMEBREW_CASK_OPTS" => "--appdir=/custom/appdir" do
-        expect(Hbc).to receive(:appdir=).with(Pathname("/custom/appdir"))
-        described_class.process("noop")
-      end
+      allow(ENV).to receive(:[])
+      allow(ENV).to receive(:[]).with("HOMEBREW_CASK_OPTS").and_return("--appdir=/custom/appdir")
+      expect(Hbc).to receive(:appdir=).with(Pathname.new("/custom/appdir"))
+      described_class.process("noop")
     end
 
     it "respects the env variable when choosing a non-default Caskroom location" do
-      with_environment "HOMEBREW_CASK_OPTS" => "--caskroom=/custom/caskdir" do
-        expect(Hbc).to receive(:caskroom=).with(Pathname("/custom/caskdir"))
-        described_class.process("noop")
-      end
+      allow(ENV).to receive(:[])
+      allow(ENV).to receive(:[]).with("HOMEBREW_CASK_OPTS").and_return("--caskroom=/custom/caskdir")
+      expect(Hbc).to receive(:caskroom=).with(Pathname.new("/custom/caskdir"))
+      described_class.process("noop")
     end
 
     it "exits with a status of 1 when something goes wrong" do

Library/Homebrew/cask/test/cask/dsl_test.rb

@@ -69,7 +69,11 @@ describe Hbc::DSL do
     end
 
     it "may use deprecated DSL version hash syntax" do
-      with_environment "HOMEBREW_DEVELOPER" => nil do
+      stub = proc do |arg|
+        arg == "HOMEBREW_DEVELOPER" ? nil : ENV[arg]
+      end
+
+      ENV.stub :[], stub do
         shutup do
           test_cask = Hbc.load("with-dsl-version")
           test_cask.token.must_equal "with-dsl-version"

Library/Homebrew/cask/test/test_helper.rb

@@ -13,9 +13,7 @@ require "global"
 # add Homebrew-Cask to load path
 $LOAD_PATH.push(HOMEBREW_LIBRARY_PATH.join("cask", "lib").to_s)
 
-require "test/support/helper/env"
 require "test/support/helper/shutup"
-include Test::Helper::Env
 include Test::Helper::Shutup
 
 def sudo(*args)