test: pick the simplest format for the tag helper tests

spec/helpers/tag_helper_spec.rb

@@ -9,35 +9,6 @@ RSpec.describe TagHelper do
       expect(status_tag(lettings_log.status)).to eq("<strong class=\"govuk-tag govuk-tag--blue\">In progress</strong>")
     end
 
-    context "when status is 'Not started'" do
-      it "returns tag with correct status text and colour and custom class" do
-        expect(status_tag("not_started", "app-tag--small")).to eq("<strong class=\"govuk-tag govuk-tag--grey app-tag--small\">Not started</strong>")
-      end
-    end
-
-    context "when status is 'Cannot start yet'" do
-      it "returns tag with correct status text and colour and custom class" do
-        expect(status_tag("cannot_start_yet", "app-tag--small")).to eq("<strong class=\"govuk-tag govuk-tag--grey app-tag--small\">Cannot start yet</strong>")
-      end
-    end
-
-    context "when status is 'Not started'" do
-      it "returns tag with correct status text and colour and custom class" do
-        code = "not_started"
-        text = "Not started"
-        colour = "grey"
-        expect(status_tag(code, "app-tag--small")).to eq("<strong class=\"govuk-tag govuk-tag--#{colour} app-tag--small\">#{text}</strong>")
-      end
-    end
-
-    context "when status is 'Cannot start yet'" do
-      it "returns tag with correct status text and colour and custom class" do
-        code = "cannot_start_yet"
-        text = "Cannot start yet"
-        colour = "grey"
-        expect(status_tag(code, "app-tag--small")).to eq("<strong class=\"govuk-tag govuk-tag--#{colour} app-tag--small\">#{text}</strong>")
-      end
-
     it "returns tag with correct status text and colour and custom class" do
       expect(status_tag("not_started", "app-tag--small")).to eq("<strong class=\"govuk-tag govuk-tag--grey app-tag--small\">Not started</strong>")
       expect(status_tag("cannot_start_yet", "app-tag--small")).to eq("<strong class=\"govuk-tag govuk-tag--grey app-tag--small\">Cannot start yet</strong>")