Revert "fix(mcp): handle page crash event in Tab constructor"

[pavelfeldman]

Reverts #40426 - I did not mean to land a failing test.

[github-actions]

Test results for "MCP"

5 failed
❌ [chrome] › mcp/dashboard.spec.ts:207 › should enter annotate mode on fresh dashboard.tsx mount with -s --annotate @mcp-windows-latest-chrome
❌ [chrome] › mcp/dashboard.spec.ts:231 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-chrome
❌ [chrome] › mcp/dashboard.spec.ts:264 › should annotate when context has no fixed viewport @mcp-windows-latest-chrome
❌ [chrome] › mcp/dashboard.spec.ts:301 › should cancel browser_annotate when the MCP request is aborted @mcp-windows-latest-chrome
❌ [chrome] › mcp/dashboard.spec.ts:361 › should switch screencast to -s session on show --annotate @mcp-windows-latest-chrome

6887 passed, 1025 skipped

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Merge workflow run.