fix(trivy): Remove cron schedule

[merkata]

Applicable spec: n/a

Overview

Remove the cron job for removal of trivy CVEs.

Rationale

We don't want to run this against the fs, there is a PR that targets annotating the .trivyignore when the rock is built and scanned for vulnerabilities (that is the thing we want).

Juju Events Changes

n/a

Module Changes

n/a

Library Changes

n/a

Checklist

• [ x] The charm style guide was applied
• [ x] The contributing guide was applied
• [ x] The changes are compliant with ISD054 - Managing Charm Complexity
• [ x] The documentation is generated using src-docs
• [ x] The documentation for charmhub is updated.
• [ x] The PR is tagged with appropriate label (urgent, trivial, complex)

[github-actions]

Test coverage for 758f496

Name                Stmts   Miss Branch BrPart  Cover   Missing
---------------------------------------------------------------
src/charm.py          530     41    172     31    89%   190-193, 357-358, 559, 590, 596, 641, 676-677, 728-735, 740, 842->847, 846, 848, 853-854, 914, 932, 939, 1029, 1038, 1050, 1071, 1080, 1099, 1103, 1132, 1185, 1317, 1339, 1346->1348, 1391->exit, 1403, 1419, 1456, 1465-1466
src/cos.py             15      0      0      0   100%
src/exceptions.py      17      1      2      1    89%   41
src/types_.py          16      0      0      0   100%
---------------------------------------------------------------
TOTAL                 578     42    174     32    90%

Static code analysis report

Run started:2023-11-21 15:46:59.082849

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 4298
  Total lines skipped (#nosec): 1
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):