Remove JsonExtractor from the requests package

The JsonExtractor is now part of the ponylang/json library.

.release-notes/38.md

@@ -0,0 +1,5 @@
+## Remove `JsonExtractor` from the requests package #38
+
+Previously, the `request` package included a `JsonExtractor` class that was used to extract JSON data from a response. This class has been removed from the package. If you were using this class, you will need to update your code to use the `JsonExtractor` from the [`ponylang/json`](https://github.com/ponylang/json) library instead instead.
+
+`JsonExtractor` is available in all versions of `ponylang/json` starting with 0.2.0.

corral.json

@@ -16,7 +16,7 @@
     },
     {
       "locator": "github.com/ponylang/json.git",
-      "version": "0.1.0"
+      "version": "0.2.0"
     }
   ],
   "info": {

github_rest_api/request/json.pony

@@ -4,84 +4,3 @@ use "net"
 
 interface val JsonConverter[A: Any #share]
   fun apply(json: JsonType val, creds: Credentials): A ?
-
-class val JsonExtractor
-  let _json: JsonType val
-
-  new val create(json: JsonType val) =>
-    _json = json
-
-  fun val apply(idx_or_key: (String | USize)): JsonExtractor val ? =>
-    match (_json, idx_or_key)
-    | (let a: JsonArray val, let idx: USize) =>
-      JsonExtractor((a.data)(idx)?)
-    | (let o: JsonObject val, let key: String) =>
-      JsonExtractor((o.data)(key)?)
-    else
-      error
-    end
-
-  fun val size(): USize ? =>
-    match _json
-    | let a: JsonArray val =>
-      a.data.size()
-    | let o: JsonObject val =>
-      o.data.size()
-    else
-      error
-    end
-
-  fun val values(): Iterator[JsonType val] ? =>
-    match _json
-    | let a: JsonArray val =>
-      a.data.values()
-    else
-      error
-    end
-
-  fun val pairs(): Iterator[(String, JsonType val)] ? =>
-    match _json
-    | let o: JsonObject val =>
-      o.data.pairs()
-    else
-      error
-    end
-
-  fun val as_array(): Array[JsonType] val ? =>
-    match _json
-    | let a: JsonArray val =>
-      a.data
-    else
-      error
-    end
-
-  fun val as_object(): Map[String, JsonType] val ? =>
-    match _json
-    | let o: JsonObject val =>
-      o.data
-    else
-      error
-    end
-
-  fun val as_string(): String ? =>
-    _json as String
-
-  fun val as_none(): None ? =>
-    _json as None
-
-  fun val as_f64(): F64 ? =>
-    _json as F64
-
-  fun val as_i64(): I64 ? =>
-    _json as I64
-
-  fun val as_bool(): Bool ? =>
-    _json as Bool
-
-  fun val as_string_or_none(): (String | None) ? =>
-    match _json
-    | let s: String => s
-    | let n: None => n
-    else
-      error
-    end