Disable run on schedule for Manylinux 2014 wheels (triton-lang#5663)

Follow up after: triton-lang#5619
We want to keep this workflow run only on workflow_dispatch
So that we don't end up promoting scheduled run to pypi

Author: atalman

.github/workflows/wheels_v2.yml

@@ -1,8 +1,6 @@
 name: Wheels Build manylinux2014_x86_64
 on:
   workflow_dispatch:
-  schedule:
-    - cron: "20 2 * * *"
 
 jobs: