Bug 1752140 [wpt PR 32556] - battery status: Remove battery-insecure-…

…context.html., a=testonly

Automatic update from web-platform-tests
battery status: Remove battery-insecure-context.html. (#32556)

This test does not reflect either the current spec or any implementation.

w3c/battery#30 removed the bits from the spec that mandated throwing a
SecurityError when the API was used in an insecure origin. Blink does not
perform any checks for a security context anyway, although the plan is to
switch spec and implementation to using [SecureContext] in the future, as
tracked in w3c/battery#15.
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wpt-commits: aa8ded0ca6ef536aa74719a73d7175499f0a2cd8
wpt-pr: 32556