Revert "ansible: temporarily patch libstdc++ header on s390x" (#3736)

This reverts commit 9c149d0.

`gcc-toolset-12` now includes the fix we were temporarily patching for.

Refs: #3659 (comment)
Refs: nodeshift/v8-build#7

ansible/roles/build-test-v8/tasks/partials/rhel8-s390x.yml

@@ -7,7 +7,7 @@
 # Older V8 builds still require Python 2.
 - name: install packages required to build V8
   ansible.builtin.dnf:
-    name: ['GConf2-devel', 'python2', 'python2-pip', 'patch']
+    name: ['GConf2-devel', 'python2', 'python2-pip']
     state: present
   notify: package updated
 
@@ -28,11 +28,3 @@
     executable: pip-3
     name: ['httplib2', 'six']
     state: present
-
-- name: temporary patch for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113960
-  ansible.posix.patch:
-    basedir: /opt/rh/gcc-toolset-12/root/
-    ignore_whitespace: true
-    src: gcc-bug-113960.patch
-    strip: 1
-  become: true