drivers: sensor: dht: Fix sensor read issue on esp32_devkitc_wrover

The DHT[11/22] sensor driver fails to read data due to an extra
"gpio_pin_set_dt" that is occurs prior to waiting for the sensor active
response. This leads to consistent failed reads on esp32 (devkitc,
wrover). After removing this line reads are consistently successful.

Signed-off-by: Omar Naffaa <omarnaffaa.on@gmail.com>