fix: remove git-validate as a dependency

The git-validate package should not be a dependency, as this causes
it to be included when this package is installed. Depending on the order
in which packages are installed, this may overwrite other git hooks
unexpectedly.

package.json

@@ -36,7 +36,6 @@
     "async": "^2.6.1",
     "bitcoinjs-lib": "^4.0.2",
     "cids": "~0.5.2",
-    "git-validate": "^2.2.2",
     "multihashes": "~0.4.12",
     "multihashing-async": "~0.5.1"
   },