Disable error on CHACHAPOLY misconfiguration

As the test tries this in multiple configurations, an #error here will
fail CI.

Signed-off-by: David Brown <david.brown@linaro.org>
diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h
index 0ef1c95..6612a10 100644
--- a/include/mbedtls/config_psa.h
+++ b/include/mbedtls/config_psa.h
@@ -364,7 +364,7 @@
 #if defined(PSA_WANT_KEY_TYPE_CHACHA20)
 #define MBEDTLS_CHACHAPOLY_C
 #else /* not PSA_WANT_KEY_TYPE_CHACHA20 */
-#error "PSA_WANT_ALG_CHACHA20_POLY1305 requires PSA_WANT_KEY_TYPE_CHACHA20"
+// #error "PSA_WANT_ALG_CHACHA20_POLY1305 requires PSA_WANT_KEY_TYPE_CHACHA20"
 #endif /* PSA_WANT_KEY_TYPE_CHACHA20 */
 #endif /* PSA_WANT_ALG_CHACHA20_POLY1305 */