chore: remove json lib

.gitmodules

@@ -1,9 +1,6 @@
 [submodule "include/stb"]
 	path = include/stb
 	url = https://github.com/nothings/stb.git
-[submodule "include/json"]
-	path = include/json
-	url = freenas:utility/json
 [submodule "include/expect"]
 	path = include/expect
 	url = freenas:utility/expect

include/json

@@ -1 +0,0 @@
-Subproject commit cc5508c5d8b1c86ad91ab59362aca900efaebca6