go-bindings: remove -lczmq

problem: the go-bindings test was failing for lack of a libczmq library,
which seems to no longer be installed or needed for flux core.

solution: remove the flag, the tests pass without it 🤷🏼‍♂️

resource/reapi/bindings/go/src/test/CMakeLists.txt

@@ -6,7 +6,6 @@ set(CGO_CFLAGS "-I${CMAKE_BINARY_DIR}")
 set(CGO_LIBRARY_FLAGS -Wl,-R
     -lflux-idset
     -lstdc++
-    -lczmq
     -ljansson
     -lhwloc
     -lboost_system