diff --git a/.idea/workspace.xml b/.idea/workspace.xml
deleted file mode 100644
index 34df2e277b07ddc5b1b0b7512c095683b1166a2b..0000000000000000000000000000000000000000
--- a/.idea/workspace.xml
+++ /dev/null
@@ -1,117 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="BranchesTreeState">
-    <expand>
-      <path>
-        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="LOCAL_ROOT" type="e8cecc67:BranchNodeDescriptor" />
-      </path>
-      <path>
-        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="REMOTE_ROOT" type="e8cecc67:BranchNodeDescriptor" />
-      </path>
-      <path>
-        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="REMOTE_ROOT" type="e8cecc67:BranchNodeDescriptor" />
-        <item name="GROUP_NODE:origin" type="e8cecc67:BranchNodeDescriptor" />
-      </path>
-    </expand>
-    <select />
-  </component>
-  <component name="ChangeListManager">
-    <list default="true" id="33eeb713-e499-4ba1-8600-38f0db30a12d" name="Default Changelist" comment="">
-      <change beforePath="$PROJECT_DIR$/projects/adyliu/imports.yml" beforeDir="false" afterPath="$PROJECT_DIR$/projects/adyliu/imports.yml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/projects/beichensky/imports.yml" beforeDir="false" afterPath="$PROJECT_DIR$/projects/beichensky/imports.yml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/projects/charleslucky/imports.yml" beforeDir="false" afterPath="$PROJECT_DIR$/projects/charleslucky/imports.yml" afterDir="false" />
-    </list>
-    <option name="SHOW_DIALOG" value="false" />
-    <option name="HIGHLIGHT_CONFLICTS" value="true" />
-    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
-    <option name="LAST_RESOLUTION" value="IGNORE" />
-  </component>
-  <component name="Git.Settings">
-    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
-  </component>
-  <component name="ProjectId" id="1loxLzc8X4VyTUrwMl9U53dlZAh" />
-  <component name="ProjectViewState">
-    <option name="hideEmptyMiddlePackages" value="true" />
-    <option name="showLibraryContents" value="true" />
-  </component>
-  <component name="PropertiesComponent">
-    <property name="RunOnceActivity.OpenProjectViewOnStart" value="true" />
-    <property name="RunOnceActivity.ShowReadmeOnStart" value="true" />
-    <property name="ignore_missing_gitignore" value="true" />
-    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
-  </component>
-  <component name="RunManager">
-    <configuration name="test" type="PythonConfigurationType" factoryName="Python" temporary="true" nameIsGenerated="true">
-      <module name="mirrors-settings" />
-      <option name="INTERPRETER_OPTIONS" value="" />
-      <option name="PARENT_ENVS" value="true" />
-      <envs>
-        <env name="PYTHONUNBUFFERED" value="1" />
-      </envs>
-      <option name="SDK_HOME" value="" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="IS_MODULE_SDK" value="true" />
-      <option name="ADD_CONTENT_ROOTS" value="true" />
-      <option name="ADD_SOURCE_ROOTS" value="true" />
-      <option name="SCRIPT_NAME" value="$PROJECT_DIR$/test.py" />
-      <option name="PARAMETERS" value="" />
-      <option name="SHOW_COMMAND_LINE" value="false" />
-      <option name="EMULATE_TERMINAL" value="false" />
-      <option name="MODULE_MODE" value="false" />
-      <option name="REDIRECT_INPUT" value="false" />
-      <option name="INPUT_FILE" value="" />
-      <method v="2" />
-    </configuration>
-    <recent_temporary>
-      <list>
-        <item itemvalue="Python.test" />
-      </list>
-    </recent_temporary>
-  </component>
-  <component name="SvnConfiguration">
-    <configuration />
-  </component>
-  <component name="TaskManager">
-    <task active="true" id="Default" summary="Default task">
-      <changelist id="33eeb713-e499-4ba1-8600-38f0db30a12d" name="Default Changelist" comment="" />
-      <created>1608277192321</created>
-      <option name="number" value="Default" />
-      <option name="presentableId" value="Default" />
-      <updated>1608277192321</updated>
-    </task>
-    <servers />
-  </component>
-  <component name="Vcs.Log.Tabs.Properties">
-    <option name="TAB_STATES">
-      <map>
-        <entry key="MAIN">
-          <value>
-            <State />
-          </value>
-        </entry>
-      </map>
-    </option>
-    <option name="oldMeFiltersMigrated" value="true" />
-  </component>
-  <component name="WindowStateProjectService">
-    <state width="1500" height="314" key="GridCell.Tab.0.bottom" timestamp="1608279778503">
-      <screen x="0" y="0" width="1536" height="824" />
-    </state>
-    <state width="1500" height="314" key="GridCell.Tab.0.bottom/0.0.1536.824@0.0.1536.824" timestamp="1608279778503" />
-    <state width="1500" height="314" key="GridCell.Tab.0.center" timestamp="1608279778503">
-      <screen x="0" y="0" width="1536" height="824" />
-    </state>
-    <state width="1500" height="314" key="GridCell.Tab.0.center/0.0.1536.824@0.0.1536.824" timestamp="1608279778503" />
-    <state width="1500" height="314" key="GridCell.Tab.0.left" timestamp="1608279778503">
-      <screen x="0" y="0" width="1536" height="824" />
-    </state>
-    <state width="1500" height="314" key="GridCell.Tab.0.left/0.0.1536.824@0.0.1536.824" timestamp="1608279778503" />
-    <state width="1500" height="314" key="GridCell.Tab.0.right" timestamp="1608279778503">
-      <screen x="0" y="0" width="1536" height="824" />
-    </state>
-    <state width="1500" height="314" key="GridCell.Tab.0.right/0.0.1536.824@0.0.1536.824" timestamp="1608279778503" />
-  </component>
-</project>
\ No newline at end of file