Remove boilerplate and outdated comments

Author: hannes-steffenhagen-diffblue

.github/workflows/pull-request-checks.yaml

@@ -1,11 +1,8 @@
-# This is a basic workflow to help you get started with Actions
-
 name: pull-request-checks
 on:
   pull_request:
     branches: [ develop ]
 
-# A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   check-macos-10_15-cmake-clang:
     runs-on: macos-10.15
@@ -16,7 +13,6 @@ jobs:
       # we'll keep 5 times that around per OS
       # to account for different versions/different
       # flags
-      # Bump so CI runs again 2
       CCACHE_MAXSIZE: 500Mi
     steps:
       - uses: actions/checkout@v2