build: move json validity check to libtrx

.github/workflows/lint.yml

@@ -15,21 +15,6 @@ jobs:
           submodules: 'true'
           fetch-depth: 0
 
-      - name: Check JSON files validity
-        shell: python
-        run: |
-          import json
-          from pathlib import Path
-          errors = False
-          for path in Path('.').rglob('**/*.json'):
-              try:
-                  json.loads(path.read_text())
-              except json.JSONDecodeError as ex:
-                  print(f'Malformed JSON in {path}: {ex}')
-                  errors = True
-          if errors:
-              exit(1)
-
       - name: Install dependencies
         run: |
           wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -