[mqtt] Stop disabling the mbedTLS hardware MPI accelerator for TLS (#19958)

Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

esphome/components/mqtt/__init__.py

@@ -3,7 +3,6 @@ import esphome.codegen as cg
 from esphome.components import logger, socket
 from esphome.components.esp32 import (
     add_idf_component,
-    add_idf_sdkconfig_option,
     idf_version,
     include_builtin_idf_component,
 )
@@ -452,10 +451,6 @@ async def to_code(config):
             cg.add(var.set_cl_certificate(config[CONF_CLIENT_CERTIFICATE]))
             cg.add(var.set_cl_key(config[CONF_CLIENT_CERTIFICATE_KEY]))
 
-        # prevent error -0x428e
-        # See https://github.com/espressif/esp-idf/issues/139
-        add_idf_sdkconfig_option("CONFIG_MBEDTLS_HARDWARE_MPI", False)
-
     if CONF_IDF_SEND_ASYNC in config and config[CONF_IDF_SEND_ASYNC]:
         cg.add_define("USE_MQTT_IDF_ENQUEUE")
     # end esp-idf