fix: hapus Select participants dari form kegiatan, gunakan RelationManager saja

app/Filament/Resources/Activities/Schemas/ActivityForm.php

@@ -2,10 +2,8 @@
 
 namespace App\Filament\Resources\Activities\Schemas;
 
-use App\Models\User;
 use Filament\Forms\Components\DatePicker;
 use Filament\Forms\Components\DateTimePicker;
-use Filament\Forms\Components\Select;
 use Filament\Forms\Components\Textarea;
 use Filament\Forms\Components\TextInput;
 use Filament\Schemas\Schema;
@@ -19,13 +17,6 @@ class ActivityForm
             Textarea::make('description')->label('Deskripsi')->rows(3)->columnSpanFull(),
             DatePicker::make('start_date')->label('Mulai')->required(),
             DatePicker::make('end_date')->label('Selesai')->required(),
-            Select::make('participants')
-                ->label('Peserta')
-                ->relationship('participants', 'name')
-                ->multiple()
-                ->preload()
-                ->searchable()
-                ->columnSpanFull(),
             DateTimePicker::make('executed_at')->label('Waktu Pelaksanaan')
                 ->visible(fn ($record) => $record?->status === 'approved'),
             Textarea::make('execution_notes')->label('Catatan Pelaksanaan')->rows(3)->columnSpanFull()