doc(Toturials): remove unused image assets

[ArgoZhang]

Link issues

fixes #8051

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (5b95826) to head (7a64bc1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #8052   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          766       766           
  Lines        34157     34157           
  Branches      4697      4697           
=========================================
  Hits         34157     34157           

Flag	Coverage Δ
BB	100.00% <ø> (?)

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