nghttp2: Deleted the entries for -client and -server, and removed a dependency on...

nghttp2: Deleted the entries for -client and -server, and removed a dependency on them from the main package.

By default there is nothing in nghttp2-client and nghttp2-server ,nghttp2-client
and nghttp2-server aren't created. So there are dependences error if install
main package.

Problem: conflicting requests
  - nothing provides nghttp2-client >= 1.52.0 needed by nghttp2-1.52.0-r0.core2_64
  - nothing provides nghttp2-server >= 1.52.0 needed by nghttp2-1.52.0-r0.core2_64

Signed-off-by: Lei Maohui <leimaohui@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>