Remove unnecessary require statements from tests

test/controllers/api_controller_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "api_controller"
 
 class ApiControllerTest < ActionController::TestCase
   def setup

test/controllers/browse_controller_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "browse_controller"
 
 class BrowseControllerTest < ActionController::TestCase
   ##

test/controllers/geocoder_controller_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "geocoder_controller"
 
 class GeocoderControllerTest < ActionController::TestCase
   ##

test/controllers/redactions_controller_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "redactions_controller"
 
 class RedactionsControllerTest < ActionController::TestCase
   ##