Remove hydra-eval-guile-jobs

This hasn't been used in a long time (Guix uses its own CI system),
and it probably doesn't work anymore.

(cherry picked from commit 23c9ca3e94)

configure.ac

@@ -53,15 +53,6 @@ fi
 
 PKG_CHECK_MODULES([NIX], [nix-main nix-expr nix-store])
 
-PKG_CHECK_MODULES([GUILE], [guile-2.0], [HAVE_GUILE=yes], [HAVE_GUILE=no])
-
-if test "x$HAVE_GUILE" = xyes; then
-  AC_PATH_PROG([GUILE], [guile])
-else
-  GUILE="guile"
-fi
-AC_SUBST([GUILE])
-
 testPath="$(dirname $(type -p expr))"
 AC_SUBST(testPath)
 
@@ -80,13 +71,11 @@ AC_CONFIG_FILES([
   src/lib/Makefile
   src/root/Makefile
   src/script/Makefile
-  src/script/hydra-eval-guile-jobs
   tests/Makefile
   tests/jobs/config.nix
 ])
 
-AC_CONFIG_COMMANDS([executable-scripts],
-  [chmod +x src/script/hydra-eval-guile-jobs])
+AC_CONFIG_COMMANDS([executable-scripts], [])
 
 AC_CONFIG_HEADER([hydra-config.h])