fix(type): remove makeObservable and makeAutoObservable function proxy option

.changeset/big-ducks-jog.md

@@ -0,0 +1,5 @@
+---
+"mobx": patch
+---
+
+remove proxy option for makeObservable and makeAutoObservable

docs/observable-state.md

@@ -260,7 +260,7 @@ The above APIs take an optional `options` argument which is an object that suppo
 -   **`autoBind: true`** uses `action.bound`/`flow.bound` by default, rather than `action`/`flow`. Does not affect explicitely annotated members.
 -   **`deep: false`** uses `observable.ref` by default, rather than `observable`. Does not affect explicitely annotated members.
 -   **`name: <string>`** gives the object a debug name that is printed in error messages and reflection APIs.
--   **`proxy: false`** forces `observable(thing)` to use non-[**proxy**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) implementation. This is a good option if the shape of the object will not change over time, as non-proxied objects are easier to debug and faster. See [avoiding proxies](#avoid-proxies).
+-   **`proxy: false`** forces `observable(thing)` to use non-[**proxy**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) implementation. This is a good option if the shape of the object will not change over time, as non-proxied objects are easier to debug and faster. This option is **not** available for `make(Auto)Observable`, see [avoiding proxies](#avoid-proxies).
 
 <details id="one-options-per-target"><summary>**Note:** options are *sticky* and can be provided only once<a href="#one-options-per-target" class="tip-anchor"></a></summary>
 `options` argument can be provided only for `target` that is NOT observable yet.<br>

packages/mobx/src/api/makeObservable.ts

@@ -23,10 +23,12 @@ import {
 // Fixes: https://github.com/mobxjs/mobx/issues/2325#issuecomment-691070022
 type NoInfer<T> = [T][T extends any ? 0 : never]
 
+type MakeObservableOptions = Omit<CreateObservableOptions, "proxy">
+
 export function makeObservable<T extends object, AdditionalKeys extends PropertyKey = never>(
     target: T,
     annotations?: AnnotationsMap<T, NoInfer<AdditionalKeys>>,
-    options?: CreateObservableOptions
+    options?: MakeObservableOptions
 ): T {
     const adm: ObservableObjectAdministration = asObservableObject(target, options)[$mobx]
     startBatch()
@@ -53,7 +55,7 @@ const keysSymbol = Symbol("mobx-keys")
 export function makeAutoObservable<T extends object, AdditionalKeys extends PropertyKey = never>(
     target: T,
     overrides?: AnnotationsMap<T, NoInfer<AdditionalKeys>>,
-    options?: CreateObservableOptions
+    options?: MakeObservableOptions
 ): T {
     if (__DEV__) {
         if (!isPlainObject(target) && !isPlainObject(Object.getPrototypeOf(target))) {