Account for deleted files in workflow files

Do not try to perform checks on files that have been removed

.github/workflows/clang-format-check.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Check Clang Format
         run: |
           # Check for modified C/C++ files
-          files=$(git diff --name-only origin/main...HEAD | grep -E '\.(c|cpp|h)$' || true)
+          files=$(git diff --name-status origin/main...HEAD | awk '$1 != "D" && /\.(c|cpp|h)$/ { print $2 }' || true)
           if [ -z "$files" ]; then
             echo "No C/C++ files modified."
             exit 0

.github/workflows/git-lfs-check.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Check git-lfs files
         run: |
 
-          files=$(git diff --name-only origin/main...HEAD | grep '\.o$' || true)
+          files=$(git diff --name-status origin/main...HEAD | awk '$1 != "D" && /\.o$/ { print $2 }' || true)
           if [ -z "$files" ]; then
             echo "No .o files modified"
             exit 0