APIルートも一致に

backend/routes/api.php

@@ -58,7 +58,7 @@ Route::group(['prefix' => 'admin'], function () {
             // MeetingImagesController
             Route::group(['prefix' => 'images'], function () {
                 Route::post('/register', '\App\Http\Controllers\Api\MeetingImagesController@register');
-                Route::delete('/delete/{meeting_id}', '\App\Http\Controllers\Api\MeetingImagesController@delete');
+                Route::delete('/delete/{image_id}', '\App\Http\Controllers\Api\MeetingImagesController@delete');
             });
     
             // MeetingApprovalsController