Remove periodic run of this workflow

.github/workflows/codeql-analysis.yml

@@ -4,11 +4,6 @@
 # You may wish to alter this file to override the set of languages analyzed,
 # or to provide custom queries or build logic.
 #
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
 name: "CodeQL"
 
 on:
@@ -17,8 +12,6 @@ on:
   pull_request:
     # The branches below must be a subset of the branches above
     branches: [ master ]
-  schedule:
-    - cron: '38 6 * * 1'
 
 jobs:
   analyze: