Remove v1 HTTPS Server Previews tests

Simply removing these tests since this implementation was never
launched.

Bug: 1005295
Change-Id: Ia2799658867ad5a0be45f238f0def5b95800ef32
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1815883Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#698518}

tools/chrome_proxy/webdriver/https_previews.py

@@ -15,38 +15,21 @@ from decorators import ChromeVersionBeforeM
 
 from selenium.common.exceptions import TimeoutException
 
-NAV_THROTTLE_VERSION = "v1_NavThrottle"
-URL_LOADER_VERSION = "v2_URLLoader"
 LITEPAGES_REGEXP = r'https://\w+\.litepages\.googlezip\.net/.*'
 
 # These are integration tests for server provided previews and the
-# protocol that supports them. This class is intended as an abstract base class
-# to allow the two versions of this feature implementation to reuse the same
-# tests.
-class HttpsPreviewsBaseClass():
-  # Abstract function for subclasses to override.
-  def getVersion(self):
-    raise Exception( "Please override this method")
+# protocol that supports them.
+class HttpsPreviews(IntegrationTest):
 
   def EnableLitePageServerPreviewsAndInit(self, t):
-    version = self.getVersion()
-
-    # These feature flags are common to both versions.
     t.EnableChromeFeature('Previews')
     t.EnableChromeFeature('LitePageServerPreviews')
+    t.EnableChromeFeature('HTTPSServerPreviewsUsingURLLoader')
 
     # RLH and NoScript may disable use of LitePageRedirect Previews.
     t.DisableChromeFeature('ResourceLoadingHints')
     t.DisableChromeFeature('NoScriptPreviews')
 
-    if version == NAV_THROTTLE_VERSION:
-      # No additional flags here, but explicitly check it given the else below.
-      pass
-    elif version == URL_LOADER_VERSION:
-      t.EnableChromeFeature('HTTPSServerPreviewsUsingURLLoader')
-    else:
-      raise Exception('"%s" is not a valid version' % version)
-
     t.AddChromeArg('--enable-spdy-proxy-auth')
     t.AddChromeArg('--dont-require-litepage-redirect-infobar')
     t.AddChromeArg('--ignore-previews-blacklist')
@@ -274,14 +257,6 @@ class HttpsPreviewsBaseClass():
               ok_responses += 1
       self.assertNotEqual(0, ok_responses)
 
-class HttpsPreviewsNavigationThrottle(HttpsPreviewsBaseClass, IntegrationTest):
-  def getVersion(self):
-    return NAV_THROTTLE_VERSION
-
-class HttpsPreviewsURLLoader(HttpsPreviewsBaseClass, IntegrationTest):
-  def getVersion(self):
-    return URL_LOADER_VERSION
-
   # Verifies that if a streaming preview is being served but needs to be
   # aborted, changing location.href will load the original page.
   #