Remove redundant I18n resets in after blocks

We already configure `I18n.locale` and we reset Globalize's fallbacks
before every test.

On the other hand, RSpec automatically resets anything which is stub
with `allow`, so there's no need to use `and_call_original` in an
`after` block.

spec/features/remote_translations_spec.rb

@@ -10,12 +10,6 @@ describe "Remote Translations" do
                                                             and_return(available_locales_response)
   end
 
-  after do
-    allow(I18n).to receive(:available_locales).and_call_original
-    allow(I18n.fallbacks).to receive(:[]).and_call_original
-    Globalize.set_fallbacks_to_all_available_locales
-  end
-
   describe "Display remote translation button when locale is included in microsoft translate client" do
 
     context "with locale that has :en fallback" do

spec/models/budget_spec.rb

@@ -274,10 +274,6 @@ describe Budget do
   end
 
   describe "#formatted_amount" do
-    after do
-      I18n.locale = :en
-    end
-
     it "correctly formats Euros with Spanish" do
       budget.update(currency_symbol: "€")
       I18n.locale = :es

spec/models/concerns/globalizable.rb

@@ -21,12 +21,6 @@ shared_examples_for "globalizable" do |factory_name|
       end
     end
 
-    after do
-      allow(I18n).to receive(:available_locales).and_call_original
-      allow(I18n.fallbacks).to receive(:[]).and_call_original
-      Globalize.set_fallbacks_to_all_available_locales
-    end
-
     context "With a defined fallback" do
       before do
         allow(I18n.fallbacks).to receive(:[]).and_return([:fr, :es])

spec/spec_helper.rb

@@ -45,9 +45,7 @@ RSpec.configure do |config|
     DatabaseCleaner.strategy = :transaction
     I18n.locale = :en
     Globalize.locale = I18n.locale
-    unless %i[controller feature request].include? example.metadata[:type]
-      Globalize.set_fallbacks_to_all_available_locales
-    end
+    Globalize.set_fallbacks_to_all_available_locales
     load Rails.root.join("db", "seeds.rb").to_s
     Setting["feature.user.skip_verification"] = nil
   end