Remove debug line

Dependencies

• [2] PMNWRTGJ Add multiple output support
• [3] 2IEFMER5 * Add --fallback to prevent problems with obsolete substitutes.
• [4] BOFOHCPK removed debug print, added last 50 lines in failure emails
• [*] 7YBYT2LQ

Change contents

• edit in src/script/hydra-build at line 256
  [2.16230]→[2.16230:16261](∅→∅)
  − print STDERR "$cmd\n";