QA: Remove redundant variable

Author: michalbundyra

src/Platforms/AbstractPlatform.php

@@ -816,8 +816,7 @@ private function buildCreateTableSQL(Table $table, bool $createForeignKeys): arr
             }
         }
 
-        $columnSql = [];
-        $columns   = [];
+        $columns = [];
 
         foreach ($table->getColumns() as $column) {
             $columnData = $this->columnToArray($column);
@@ -847,7 +846,7 @@ private function buildCreateTableSQL(Table $table, bool $createForeignKeys): arr
             }
         }
 
-        return array_merge($sql, $columnSql);
+        return $sql;
     }
 
     /**