pkey-random: Removed setting mbedtls_target in libs

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/programs/pkey/CMakeLists.txt b/programs/pkey/CMakeLists.txt
index b747a3f..3ad5643 100644
--- a/programs/pkey/CMakeLists.txt
+++ b/programs/pkey/CMakeLists.txt
@@ -1,7 +1,3 @@
-set(libs
-    ${mbedtls_target}
-)
-
 set(executables_mbedtls
     dh_client
     dh_server
diff --git a/programs/random/CMakeLists.txt b/programs/random/CMakeLists.txt
index 95cd33f..e5edf7b 100644
--- a/programs/random/CMakeLists.txt
+++ b/programs/random/CMakeLists.txt
@@ -1,7 +1,3 @@
-set(libs
-    ${mbedtls_target}
-)
-
 set(executables
     gen_entropy
     gen_random_ctr_drbg