remove incorrect migration column

Author: marickvantuil

database/migrations/2017_12_14_151403_create_emails_table.php

@@ -27,7 +27,6 @@ public function up()
             $table->string('view', 255);
             $table->binary('variables')->nullable();
             $table->binary('body');
-            $table->binary('attachments');
             $table->integer('attempts')->default(0);
             $table->boolean('sending')->default(0);
             $table->boolean('failed')->default(0);