[flow] Remove react.ref_as_prop=disabled override in component_synt…

…ax test suite

Summary:
The behavior remains mostly the same. The test is asserting that we are actually ignoring the ref prop in component spread.

Before, we ignore it and subtype the ref prop in jsx against `React.ElementRef<typeof Component>`, which gives back `React.RefSetter<void>` and explains the previous error.

Now with ref-as-prop, the ref prop appears as regular prop and subtype against the entire props object with spreaded ref prop intentionally dropped, so we get the prop-missing error.

Changelog: [internal]

Reviewed By: panagosg7

Differential Revision: D66849734

fbshipit-source-id: 870ed0bc794f76bf7daf15eef45862f9a5db053b

tests/component_syntax/.flowconfig

@@ -3,7 +3,6 @@ component_syntax=true
 experimental.component_syntax.hook_compatibility=true
 all=true
 no_flowlib=false
-react.ref_as_prop=disabled
 
 [lints]
 nested-component=error

tests/component_syntax/component_syntax.exp

@@ -217,23 +217,22 @@ References:
                                                ^^^ [1]
 
 
-Error ---------------------------------------------------------------------------------------------- annotation.js:52:17
+Error ----------------------------------------------------------------------------------------------- annotation.js:52:2
 
-Cannot create `SpreadRef` element because in property `ref`: [incompatible-type]
- - Either number [1] is incompatible with object type [2].
- - Or number [1] is incompatible with function type [3].
+Cannot create `SpreadRef` element because property `ref` is missing in object type [1] but exists in props [2].
+[prop-missing]
 
-   annotation.js:52:17
-    52| <SpreadRef ref={1} />; // error: string and number refs are still not allowed
-                        ^ [1]
+   annotation.js:52:2
+   52| <SpreadRef ref={1} />; // error: string and number refs are still not allowed
+        ^^^^^^^^^
 
 References:
-   <BUILTINS>/react.js:196:5
-   196|   | { -current: T | null, ... }
-            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [2]
-   <BUILTINS>/react.js:197:6
-   197|   | ((T | null) => mixed)
-             ^^^^^^^^^^^^^^^^^^^ [3]
+   annotation.js:51:40
+   51| declare var SpreadRef: component(...p: {ref: number}); // error
+                                              ^^^^^^^^^^^^^ [1]
+   annotation.js:52:1
+   52| <SpreadRef ref={1} />; // error: string and number refs are still not allowed
+       ^^^^^^^^^^^^^^^^^^^^^ [2]
 
 
 Error ---------------------------------------------------------------------------------------------- annotation.js:54:57
@@ -1249,23 +1248,22 @@ References:
                                           ^^^ [1]
 
 
-Error ------------------------------------------------------------------------------------------------ declared.js:54:17
+Error ------------------------------------------------------------------------------------------------- declared.js:54:2
 
-Cannot create `SpreadRef` element because in property `ref`: [incompatible-type]
- - Either number [1] is incompatible with object type [2].
- - Or number [1] is incompatible with function type [3].
+Cannot create `SpreadRef` element because property `ref` is missing in object type [1] but exists in props [2].
+[prop-missing]
 
-   declared.js:54:17
-    54| <SpreadRef ref={1} />; // error: string and number refs are still not allowed
-                        ^ [1]
+   declared.js:54:2
+   54| <SpreadRef ref={1} />; // error: string and number refs are still not allowed
+        ^^^^^^^^^
 
 References:
-   <BUILTINS>/react.js:196:5
-   196|   | { -current: T | null, ... }
-            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [2]
-   <BUILTINS>/react.js:197:6
-   197|   | ((T | null) => mixed)
-             ^^^^^^^^^^^^^^^^^^^ [3]
+   declared.js:53:35
+   53| declare component SpreadRef(...p: {ref: number}); // error
+                                         ^^^^^^^^^^^^^ [1]
+   declared.js:54:1
+   54| <SpreadRef ref={1} />; // error: string and number refs are still not allowed
+       ^^^^^^^^^^^^^^^^^^^^^ [2]
 
 
 Error ------------------------------------------------------------------------------------------------ declared.js:56:52