[AIRFLOW-6452] scheduler_job.py - remove excess sleep/log/duration calls

[tooptoop4]

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Issue link: AIRFLOW-6452

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[tooptoop4]

before this PR it had 2 sleeps (no need!), it seems the one I removed was there before the processor_poll_interval sleep was added.

[codecov-io]

Codecov Report

Merging #7089 into master will decrease coverage by 0.27%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #7089      +/-   ##
=========================================
- Coverage   85.07%   84.8%   -0.28%     
=========================================
  Files         680     680              
  Lines       38810   38802       -8     
=========================================
- Hits        33019   32905     -114     
- Misses       5791    5897     +106

Impacted Files	Coverage Δ
airflow/jobs/scheduler_job.py	89.29% <ø> (+0.45%)	⬆️
airflow/kubernetes/volume_mount.py	44.44% <0%> (-55.56%)	⬇️
airflow/kubernetes/volume.py	52.94% <0%> (-47.06%)	⬇️
airflow/kubernetes/pod_launcher.py	45.25% <0%> (-46.72%)	⬇️
airflow/kubernetes/refresh_config.py	50.98% <0%> (-23.53%)	⬇️
...rflow/contrib/operators/kubernetes_pod_operator.py	78.75% <0%> (-20%)	⬇️

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[tooptoop4]

@nuclearpinguin pls merge