Revert "[WebAPKs] Make WebAPK update flow more sensible"

chrome/android/webapk/shell_apk/shell_apk_version.gni

Index: chrome/android/webapk/shell_apk/shell_apk_version.gni
diff --git a/chrome/android/webapk/shell_apk/shell_apk_version.gni b/chrome/android/webapk/shell_apk/shell_apk_version.gni
index 718adb43d499737921568807419375a9898a1d12..46d2071059ad74cfdb0e9b083e92f6651a5bff65 100644
--- a/chrome/android/webapk/shell_apk/shell_apk_version.gni
+++ b/chrome/android/webapk/shell_apk/shell_apk_version.gni
@@ -3,13 +3,5 @@
 # found in the LICENSE file.
 
 # Must be incremented whenever code in //chrome/android/webapk/shell_apk
-# (including AndroidManifest.xml) is updated. This version should be incremented
-# prior to uploading a new ShellAPK to the WebAPK Minting Server.
-# Does not affect Chrome.apk
-template_shell_apk_version = 3
-
-# The ShellAPK version expected by Chrome. Chrome will try to update the WebAPK
-# if the WebAPK's ShellAPK version is less than |expected_shell_apk_version|.
-# The version should be incremented after a new ShellAPK has been uploaded to
-# the WebAPK Minting Server.
-expected_shell_apk_version = 3
+# (including AndroidManifest.xml) is updated.
+shell_apk_version = 3