bandit: Remove toml extra

bandit >= 1.7.5 no longer requires it in Python 3.11 [1]. We can drop
it now because Python 3.10 is no longer supported.

[1] https://github.com/PyCQA/bandit/commit/5a8f1050011a6eeca96

Change-Id: I2b6fcaa6b902a1aa16da3a5241dad64820234ac5
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

.pre-commit-config.yaml

@@ -22,7 +22,6 @@ repos:
     hooks:
       - id: bandit
         args: ['-c', 'pyproject.toml']
-        additional_dependencies: ['.[toml]']
   - repo: https://github.com/asottile/pyupgrade
     rev: v3.21.2
     hooks: