Remove image timeout

[DavidFair]

Description:

Removes manually handling image timeouts - the wait flag should imply this and it's brittle for other unit tests where this can hang

Unfortunately, we can't do the same for migrate, as there's no equivalent flag

Special Notes:

---

Submitter:

Have you (where applicable):

• Added unit tests?
• Checked the latest commit runs on Dev?
• Updated the example config file(s) and README?

---

Reviewer

Does this PR:

• Place non-StackStorm code into the lib directory?
• Have unit tests for the action/sensor and lib layers?
• Have clear and obvious action parameter names and descriptions?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.18%. Comparing base (509c54b) to head (ca7589b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #460      +/-   ##
==========================================
- Coverage   99.19%   99.18%   -0.01%     
==========================================
  Files         112      112              
  Lines        2726     2715      -11     
  Branches      338      335       -3     
==========================================
- Hits         2704     2693      -11     
  Misses         19       19              
  Partials        3        3              

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