remove build-lightning workflow

Author: josephleekl

.github/workflows/pr.yml

@@ -17,8 +17,6 @@ concurrency:
 jobs:
   build-fast:
     uses: ./.github/workflows/build-fast.yml
-  build-lightning:
-    uses: ./.github/workflows/build-lightning.yml
   # Specifying a dependent job allows us to select a single "requires" check in the project GitHub settings
   all:
     if: ${{ always() }}

.github/workflows/push.yml

@@ -12,8 +12,6 @@ concurrency:
 jobs:
   build-fast:
     uses: ./.github/workflows/build-fast.yml
-  build-lightning:
-    uses: ./.github/workflows/build-lightning.yml
   all:
     needs:
       - build-fast