test/cask: remove disabled functionality tests.

Library/Homebrew/test/cask/depends_on_spec.rb

@@ -47,14 +47,6 @@ describe "Satisfy Dependencies and Requirements", :cask do
       end
     end
 
-    context "given a string", :needs_compat do
-      let(:cask) { Cask::CaskLoader.load(cask_path("compat/with-depends-on-macos-string")) }
-
-      it "does not raise an error" do
-        expect { install }.not_to raise_error
-      end
-    end
-
     context "given a symbol" do
       let(:cask) { Cask::CaskLoader.load(cask_path("with-depends-on-macos-symbol")) }
 

Library/Homebrew/test/cask/dsl_spec.rb

@@ -335,14 +335,6 @@ describe Cask::DSL, :cask do
   end
 
   describe "depends_on macos" do
-    context "string disabled", :needs_compat do
-      let(:token) { "compat/with-depends-on-macos-string" }
-
-      it "allows depends_on macos to be specified" do
-        expect { cask }.to raise_error(Cask::CaskInvalidError)
-      end
-    end
-
     context "invalid depends_on macos value" do
       let(:token) { "invalid/invalid-depends-on-macos-bad-release" }