[pinmux,testutils] only configure SW strap pins input selection

This fixes #17486.

Signed-off-by: Timothy Trippel <ttrippel@google.com>
diff --git a/sw/device/lib/testing/pinmux_testutils.c b/sw/device/lib/testing/pinmux_testutils.c
index 952a59c..32e0d8b 100644
--- a/sw/device/lib/testing/pinmux_testutils.c
+++ b/sw/device/lib/testing/pinmux_testutils.c
@@ -26,12 +26,6 @@
   CHECK_DIF_OK(dif_pinmux_input_select(pinmux,
                                        kTopEarlgreyPinmuxPeripheralInGpioGpio24,
                                        kTopEarlgreyPinmuxInselIoc2));
-  CHECK_DIF_OK(dif_pinmux_output_select(pinmux, kTopEarlgreyPinmuxMioOutIoc0,
-                                        kTopEarlgreyPinmuxOutselGpioGpio22));
-  CHECK_DIF_OK(dif_pinmux_output_select(pinmux, kTopEarlgreyPinmuxMioOutIoc1,
-                                        kTopEarlgreyPinmuxOutselGpioGpio23));
-  CHECK_DIF_OK(dif_pinmux_output_select(pinmux, kTopEarlgreyPinmuxMioOutIoc2,
-                                        kTopEarlgreyPinmuxOutselGpioGpio24));
 
   // Configure UART0 RX input to connect to MIO pad IOC3
   CHECK_DIF_OK(dif_pinmux_input_select(pinmux,