Remove dependencies and -y parameter (#514)

clevis-pin-pkcs11 has been changed to retrieve
its whole dependencies (socat, openssl, ...)
so it is not necessary to install them manually

Signed-off-by: Sergio Arroutbi <sarroutb@redhat.com>

README.md

@@ -248,7 +248,7 @@ For installation and configuration of the clevis PKCS#11 feature, next steps mus
 1 - Install Clevis required dependencies, including PKCS#11 dependencies:
 
 ```
-$ sudo dnf install -y openssl socat clevis-pin-pkcs11
+$ sudo dnf install clevis-pin-pkcs11
 ```
 
 2 - The PKCS11 device must be accessible by “pkcs11-tool”: