nginx - remove cipher kEDH+AESGCM

follow-up to I39b389b63ae6b8
and I830bec497338

also remove cipher kEDH+AESGCM

"kDHE, kEDH: cipher suites using ephemeral DH key agreement, including anonymous cipher suites."

(https://www.openssl.org/docs/apps/ciphers.html)

we just wanted ECDHE, and not DHE/kDHE

Change-Id: Ie9badde555d3e919571d92029492779da7c5ee53