TC-PS-3.1: Remove yaml

This test is automated in python now, yaml is no longer required.

Fixes: project-chip/matter-test-scripts#127

Author: cecille

src/app/tests/suites/certification/Test_TC_PS_3_1.yaml

@@ -261,7 +261,7 @@
     "FlowMeasurement": ["Test_TC_FLW_2_2"],
     "GroupKeyManagement": ["Test_TC_GRPKEY_5_4"],
     "OccupancySensing": ["Test_TC_OCC_3_1"],
-    "PowerSource": ["Test_TC_PS_2_2", "Test_TC_PS_3_1"],
+    "PowerSource": ["Test_TC_PS_2_2"],
     "BooleanState": ["Test_TC_BOOL_2_2"],
     "ColorControl": [
         "Test_TC_CC_3_1",