Remove PKCS#11 library wrapper.

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/ChangeLog.d/remove_pkcs11.txt b/ChangeLog.d/remove_pkcs11.txt
new file mode 100644
index 0000000..5c8134c
--- /dev/null
+++ b/ChangeLog.d/remove_pkcs11.txt
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+Removals
+   * Remove PKCS#11 library wrapper. PKCS#11 has limited functionality,
+     lacks automated tests and has scarce documentation. Also, PSA Crypto
+     provides a more flexible private key management.
+     More details on PCKS#11 wrapper removal can be found in the mailing list
+     https://lists.trustedfirmware.org/pipermail/mbed-tls/2020-April/000024.html