Update simulator_device.py

[chaserileyroberts]

shots=1000 -> shots=None

[codecov]

Codecov Report

Merging #58 (ecef851) into master (84c4e8b) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #58   +/-   ##
=======================================
  Coverage   99.10%   99.10%           
=======================================
  Files           8        8           
  Lines         334      334           
=======================================
  Hits          331      331           
  Misses          3        3           

Impacted Files	Coverage Δ
pennylane_cirq/pasqal_device.py	100.00% <100.00%> (ø)
pennylane_cirq/qsim_device.py	96.55% <100.00%> (ø)
pennylane_cirq/simulator_device.py	100.00% <100.00%> (ø)

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[trbromley]

Thanks @Thenerdstation! We also need this on the other devices:

• QSimDevice
• QSimhDevice
• PasqalDevice
• MixedStateSimulatorDevice

Also, what about adding a quick test? I was surprised the tests were still passing with non-analytic being the default, but this is because we never check the default for shots and always explicitly pass. So even a test where we don't pass a shots argument but we check that dev.shots is None?