docs: remove references of DHE-PSK

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/configs/ext/crypto_config_profile_medium.h b/configs/ext/crypto_config_profile_medium.h
index 637c2ff..83048d0 100644
--- a/configs/ext/crypto_config_profile_medium.h
+++ b/configs/ext/crypto_config_profile_medium.h
@@ -549,16 +549,10 @@
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA
- *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384
  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384
- *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384
  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA
- *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA
- *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256
  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256
- *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256
  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA
- *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_RSA_WITH_AES_256_GCM_SHA384
  *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256
  *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA
diff --git a/docs/architecture/tls13-support.md b/docs/architecture/tls13-support.md
index 52669fd..c98ccf7 100644
--- a/docs/architecture/tls13-support.md
+++ b/docs/architecture/tls13-support.md
@@ -115,7 +115,6 @@
   | MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED     | no      |
   |                                          |         |
   | MBEDTLS_KEY_EXCHANGE_PSK_ENABLED         | n/a (2) |
-  | MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED     | n/a     |
   | MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED   | n/a     |
   | MBEDTLS_KEY_EXCHANGE_RSA_ENABLED         | n/a     |
   | MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED     | n/a     |