Remove special x/ handling patch in gerrit

Upstream Gerrit has been fixing this up. It's in 3.2 as of
https://gerrit-review.googlesource.com/c/gerrit/+/306519

Change-Id: Ie8196c38629b4893364b969aeb6ac466cff0c93f

docker/gerrit/patches/serve-x-normally.patch

@@ -1,13 +0,0 @@
-diff --git a/java/com/google/gerrit/httpd/raw/StaticModule.java b/java/com/google/gerrit/httpd/raw/StaticModule.java
-index 414a120194..9d59535a66 100644
---- a/java/com/google/gerrit/httpd/raw/StaticModule.java
-+++ b/java/com/google/gerrit/httpd/raw/StaticModule.java
-@@ -71,7 +71,7 @@ public class StaticModule extends ServletModule {
-           "/c/*",
-           "/p/*",
-           "/q/*",
--          "/x/*",
-+          //"/x/*",
-           "/admin/*",
-           "/dashboard/*",
-           "/groups/self",

playbooks/zuul/gerrit/run.yaml

@@ -1,14 +1,5 @@
 - hosts: all
   tasks:
-    - name: Patch Gerrit's webapp routes to not shadow x/
-      shell: |
-        set -ex
-        GERRIT_BASE=/home/zuul/src/gerrit.googlesource.com/gerrit
-        SYSTEM_CONFIG_BASE=/home/zuul/src/opendev.org/opendev/system-config
-        # Disable the x/ redirection since we have x/ projects
-        patch $GERRIT_BASE/java/com/google/gerrit/httpd/raw/StaticModule.java \
-          $SYSTEM_CONFIG_BASE/docker/gerrit/patches/serve-x-normally.patch
-
     - name: Build gerrit
       include_role:
         name: bazelisk-build