Remove the flight fields link from admin #614 (#615)

* Remove the flight fields link from admin #614

* Change flight_field_value col to be nullable

* Fix updater design

app/Database/migrations/2020_03_04_044305_flight_field_nullable.php

@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Allow the flight field value to be nullable
+ */
+class FlightFieldNullable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('flight_field_values', function ($table) {
+            $table->text('value')->change()->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+    }
+}