Remove stray inst_map references

Author: wshanks

qiskit_experiments/library/characterization/fine_amplitude.py

@@ -460,11 +460,7 @@ def _default_transpile_options(cls) -> Options:
 
         Experiment Options:
             basis_gates: Set to :code:`["szx"]`.
-            inst_map: The instruction schedule map that will contain the schedule for the
-                Rzx(pi/2) gate. This schedule should be stored under the instruction name
-                ``szx``.
         """
         options = super()._default_transpile_options()
         options.basis_gates = ["szx"]
-        options.inst_map = None
         return options

qiskit_experiments/library/characterization/fine_frequency.py

@@ -123,7 +123,6 @@ def _default_experiment_options(cls) -> Options:
     def _default_transpile_options(cls) -> Options:
         """Default transpiler options."""
         options = super()._default_transpile_options()
-        options.inst_map = None
         options.basis_gates = ["sx", "rz", "delay"]
         return options