hyper: drop support

lib : remove all hyper code
configure: stop detecting hyper
docs: no more mention of hyper
tests: mo more special-handling of hyper builds
CI: no jobs using hyper

Closes #15120

lib/Makefile.inc

@@ -114,7 +114,6 @@ LIB_CFILES =         \
   base64.c           \
   bufq.c             \
   bufref.c           \
-  c-hyper.c          \
   cf-h1-proxy.c      \
   cf-h2-proxy.c      \
   cf-haproxy.c       \
@@ -248,7 +247,6 @@ LIB_HFILES =         \
   asyn.h             \
   bufq.h             \
   bufref.h           \
-  c-hyper.h          \
   cf-h1-proxy.h      \
   cf-h2-proxy.h      \
   cf-haproxy.h       \