Update docs.json

Delete another potentially problematic page.

Author: Amanda Butler

docs.json

@@ -151,7 +151,6 @@
             "title": "Storage",
             "intro": {"type": "markdown", "url": "https://github.com/ARMmbed/Handbook/blob/new_engine/docs/reference/api/storage/storage.md"},
             "sources": [
-              {"type": "markdown", "url": "https://github.com/ARMmbed/Handbook/blob/new_engine/docs/reference/api/storage/LittleFileSystem.md"},
               {"type": "markdown", "url": "https://github.com/ARMmbed/Handbook/blob/new_engine/docs/reference/api/storage/HeapBlockDevice.md"},
               {"type": "markdown", "url": "https://github.com/ARMmbed/Handbook/blob/new_engine/docs/reference/api/storage/MBRBlockDevice.md"},
               {"type": "markdown", "url": "https://github.com/ARMmbed/Handbook/blob/new_engine/docs/reference/api/storage/ChainingBlockDevice.md"},