fix styleci errors

Author: paras-malhotra

src/Illuminate/Database/Console/Migrations/MigrateCommand.php

@@ -6,7 +6,6 @@
 use Illuminate\Contracts\Events\Dispatcher;
 use Illuminate\Database\Events\SchemaLoaded;
 use Illuminate\Database\Migrations\Migrator;
-use Illuminate\Database\SQLiteConnection;
 use Illuminate\Database\SqlServerConnection;
 
 class MigrateCommand extends BaseCommand

src/Illuminate/Database/SQLiteConnection.php

@@ -9,7 +9,6 @@
 use Illuminate\Database\Schema\SQLiteBuilder;
 use Illuminate\Database\Schema\SqliteSchemaState;
 use Illuminate\Filesystem\Filesystem;
-use RuntimeException;
 
 class SQLiteConnection extends Connection
 {

src/Illuminate/Database/Schema/SqliteSchemaState.php

@@ -2,10 +2,6 @@
 
 namespace Illuminate\Database\Schema;
 
-use Exception;
-use Illuminate\Support\Str;
-use Symfony\Component\Process\Process;
-
 class SqliteSchemaState extends SchemaState
 {
     /**