Disable flaky rmprocs test (JuliaLang/julia#35677)

Author: Keno

test/distributed_exec.jl

@@ -1083,6 +1083,7 @@ end
 test_add_procs_threaded_blas()
 
 #19687
+if false ### TODO: The logic that is supposed to implement this is racy - Disabled for now
 # ensure no race conditions between rmprocs and addprocs
 for i in 1:5
     p = addprocs_with_testenv(1)[1]
@@ -1112,6 +1113,7 @@ if DoFullTest
         sleep(0.1)
     end
 end
+end
 
 # Test addprocs/rmprocs from master node only
 for f in [ ()->addprocs(1; exeflags=test_exeflags), ()->rmprocs(workers()) ]