doc: remove N-API version for Experimental APIs

Experimental APIs should not have an N-API version
specified. Remove cases were one had been added
incorrectly.

PR-URL: #28330
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Gabriel Schulhof <gabriel.schulhof@intel.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: mhdawson

doc/api/n-api.md

@@ -1587,7 +1587,6 @@ structure, in most cases using a `TypedArray` will suffice.
 #### napi_create_date
 <!-- YAML
 added: v11.11.0
-napiVersion: 4
 -->
 
 > Stability: 1 - Experimental
@@ -2232,7 +2231,6 @@ This API returns various properties of a `DataView`.
 #### napi_get_date_value
 <!-- YAML
 added: v11.11.0
-napiVersion: 4
 -->
 
 > Stability: 1 - Experimental
@@ -2841,7 +2839,6 @@ This API checks if the `Object` passed in is a buffer.
 ### napi_is_date
 <!-- YAML
 added: v11.11.0
-napiVersion: 4
 -->
 
 > Stability: 1 - Experimental
@@ -3941,7 +3938,6 @@ JavaScript object becomes garbage-collected.
 
 <!-- YAML
 added: v8.0.0
-napiVersion: 1
 -->
 ```C
 napi_status napi_add_finalizer(napi_env env,