PR summary

Quick fix for shared axis warning during .clear()

This PR implements a minimal, targeted fix for issue #30159, where calling .clear() on a shared axes — particularly with log scale — results in:

• Limits being reset to (0, 1), which is invalid in log scale
• Warnings emitted due to improper propagation of limits

This patch does a quick fix for the warnings in the issue but does not fully implement the proposed fix in issue #28851

What does this fix do?

• Prevents resetting axis limits and scale in .clear() if the axis is shared
• Ensures .clear() only clears data-like elements (lines, text, collections), not layout or shared state

What this does not do?

• This does not define long-term .clear() semantics

PR checklist

• "closes [Bug]: Calling axes.clear() on a shared y or x-axis issues an unexpected warning with log scale #30159" is in the body of the PR description to link the related issue
• new and changed code is tested
• [N/A] Plotting related features are demonstrated in an example
• [N/A] New Features and API Changes are noted with a directive and release note
• Documentation complies with general and docstring guidelines