项目相关优化

app/Models/ProjectModel.php

@@ -62,15 +62,6 @@ class ProjectModel extends BaseModel
         return $this->belongsToMany(FrameworkModel::class, 'project_frameworks_relations', 'project_id', 'framework_id');
     }
 
-    /**
-     * 技术栈关联
-     * @return BelongsToMany
-     */
-    public function technologyStacks(): BelongsToMany
-    {
-        return $this->belongsToMany(TechnologyStackModel::class, 'project_technology_stacks_relations', 'project_id', 'technology_stacks_id');
-    }
-
     /**
      * 功能关联
      * @return HasMany