誤ってクローンしたフォルダを削除したい。

PS C:\Users\toshi\Desktop\mission\chapter-5\jquery-5-3> git clone https://<私のユーザー名>:<取得したトークン>@github.com/prs-teacher/jquery_practice.git
Cloning into 'jquery_practice'...
remote: Enumerating objects: 79, done.
remote: Counting objects: 100% (31/31), done.
remote: Compressing objects: 100% (24/24), done.
Receiving objects: 100% (79/79), 16.08 KiB | 219.00 KiB/s, done.d 7 (delta 7), pack-reused 48

Resolving deltas: 100% (16/16), done.
発生場所 行:1 文字:5
+ $rm -rf jquery_practice
+     ~~~
式またはステートメントのトークン '-rf' を使用できません。
発生場所 行:1 文字:9
+ $rm -rf jquery_practice
+         ~~~~~~~~~~~~~~~
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : UnexpectedToken
 
PS C:\Users\toshi\Desktop\mission\chapter-5\jquery-5-3> git rm jquery_practice
fatal: Unable to create 'C:/Users/toshi/.git/index.lock': File exists.

Another git process seems to be running in this repository, e.g.
are terminated then try again. If it still fails, a git process
may have crashed in this repository earlier:
remove the file manually to continue.
PS C:\Users\toshi\Desktop\mission\chapter-5\jquery-5-3> cd jquery-5-3
cd : パス 'C:\Users\toshi\Desktop\mission\chapter-5\jquery-5-3\jquery-5-3' が存在しないため検出できません。
発生場所 行:1 文字:1
+ cd jquery-5-3
    + CategoryInfo          : ObjectNotFound: (C:\Users\toshi\...-5-3\jquery-5-3:String) [Set-Location], ItemNotFoundException
    + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.SetLocationCommand
 
PS C:\Users\toshi\Desktop\mission\chapter-5\jquery-5-3> git rm jquery_practice
fatal: Unable to create 'C:/Users/toshi/.git/index.lock': File exists.

Another git process seems to be running in this repository, e.g.
an editor opened by 'git commit'. Please make sure all processes
are terminated then try again. If it still fails, a git process
may have crashed in this repository earlier:
remove the file manually to continue.
PS C:\Users\toshi\Desktop\mission\chapter-5\jquery-5-3> git status
warning: could not open directory 'Application Data/': Permission denied
warning: could not open directory 'Cookies/': Permission denied
warning: could not open directory 'Local Settings/': Permission denied
warning: could not open directory 'My Documents/': Permission denied
warning: could not open directory 'NetHood/': Permission denied
warning: could not open directory 'PrintHood/': Permission denied
warning: could not open directory 'Recent/': Permission denied
warning: could not open directory 'SendTo/': Permission denied
warning: could not open directory 'Templates/': Permission denied
warning: could not open directory 'スタート メニュー/': Permission denied
On branch master

No commits yet

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        ../../../../.bash_history
        ../../../../.git-for-windows-updater
        ../../../../.gitconfig
        ../../../../.lesshst
        ../../../../.vscode/
        ../../../../3D Objects/
        ../../../../AppData/
        ../../../../Contacts/
        ../../../../Creative Cloud Files/
        ../../../
        ../../../../Documents/
        ../../../../Downloads/
        ../../../../Favorites/
        "../../../../Google \343\203\211\343\203\251\343\202\244\343\203\226/"
        ../../../../Links/
        ../../../../MicrosoftEdgeBackups/
        ../../../../Music/
        ../../../../NTUSER.DAT
        ../../../../NTUSER.DAT{53b39e88-18c4-11ea-a811-000d3aa4692b}.TM.blf
        ../../../../NTUSER.DAT{53b39e88-18c4-11ea-a811-000d3aa4692b}.TMContainer00000000000000000001.regtrans-ms
        ../../../../NTUSER.DAT{53b39e88-18c4-11ea-a811-000d3aa4692b}.TMContainer00000000000000000002.regtrans-ms
        ../../../../OneDrive/
        ../../../../Pictures/
        ../../../../Saved Games/
        ../../../../Searches/
        ../../../../Sti_Trace.log
        ../../../../cd
        ../../../../gitsample/
        ../../../../index.html
        ../../../../ntuser.dat.LOG1
        ../../../../ntuser.dat.LOG2
        ../../../../ntuser.ini
        "../../../../\345\277\234\345\257\276\346\226\207\350\250\200\351\233\2062015\343\200\2007\346\234\210\357\274\255\357\274\264\347\224\250.docx"

nothing added to commit but untracked files present (use "git add" to track)