Merge pull request #10010 from 9999years/fix-9941

Fix "Failed tcsetattr(TCSADRAIN)" when `nix repl` is not a TTY

(cherry picked from commit 864fc85fc88ff092725ba99907611b2b8d2205fb)
Change-Id: I8198674b935fabd741a349cc74544e61c53ea7b3

src/libcmd/repl.cc

@@ -340,7 +340,6 @@ bool NixRepl::getLine(std::string & input, const std::string & prompt)
     };
 
     setupSignals();
-    Finally resetTerminal([&]() { rl_deprep_terminal(); });
     char * s = readline(prompt.c_str());
     Finally doFree([&]() { free(s); });
     restoreSignals();