docs: updated modbus api reference documents for target esp32h2

docs/docs_not_updated/esp32h2.txt

@@ -29,5 +29,4 @@ api-reference/system/inc/power_management_esp32s2_and_later
 api-reference/protocols/esp_serial_slave_link
 api-reference/protocols/esp_sdio_slave_protocol
 api-reference/protocols/esp_spi_slave_protocol
-api-reference/protocols/modbus
 api-reference/protocols/index

tools/ci/mypy_ignore_list.txt

@@ -74,8 +74,6 @@ examples/protocols/http_server/ws_echo_server/ws_server_example_test.py
 examples/protocols/https_request/example_test.py
 examples/protocols/https_x509_bundle/example_test.py
 examples/protocols/icmp_echo/example_test.py
-examples/protocols/modbus/serial/example_test.py
-examples/protocols/modbus/tcp/example_test.py
 examples/protocols/mqtt/ssl/mqtt_ssl_example_test.py
 examples/protocols/mqtt/tcp/mqtt_tcp_example_test.py
 examples/protocols/mqtt/ws/mqtt_ws_example_test.py