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)

src/script/Makefile.am

@@ -1,6 +1,5 @@
 EXTRA_DIST =					\
-  $(distributable_scripts)			\
-  hydra-eval-guile-jobs.in
+  $(distributable_scripts)
 
 distributable_scripts =				\
   hydra-backfill-ids				\
@@ -17,5 +16,4 @@ distributable_scripts =				\
   nix-prefetch-hg
 
 bin_SCRIPTS =					\
-  $(distributable_scripts)			\
-  hydra-eval-guile-jobs
+  $(distributable_scripts)