Remove USE_PSA from remaining documentation

MBED_TLS_USE_PSA_CRYPTO is now always enabled we need to remove
documentation discussing cases when it is disabled.

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/docs/architecture/psa-migration/syms.sh b/docs/architecture/psa-migration/syms.sh
index 6c9686e..0fc55dd 100755
--- a/docs/architecture/psa-migration/syms.sh
+++ b/docs/architecture/psa-migration/syms.sh
@@ -11,7 +11,7 @@
 #
 # Usage:
 # - build the library with debug symbols and the config you're interested in
-#   (default, full minus MBEDTLS_USE_PSA_CRYPTO, full, etc.)
+#   (default, full, etc.)
 # - launch this script with 1 or more arguments depending on the analysis' goal:
 #     - if only 1 argument is used (which is the name of the used config,
 #       ex: full), then the analysis is done on libmbedx509 and libmbedtls