Remove deprecated input from linting workflow

Author: apaillier-ledger

.github/workflows/coding_style_checks.yml

@@ -21,4 +21,3 @@ jobs:
     uses: LedgerHQ/ledger-app-workflows/.github/workflows/reusable_lint.yml@v1
     with:
       source: './src'
-      extensions: 'h,c'