Revert "Add missing DaemonMode.jl"

This reverts commit 10f05a3074d9363341a0e1e1a5482ea13a1566cd.

Project.toml

@@ -1,4 +1,5 @@
 [deps]
+DaemonMode = "d749ddd5-2b29-4920-8305-6ff5a704e36e"
 SymbolicRegression = "8254be44-1295-4e6a-a16d-46603ac705cb"
 
 [compat]

pysr/sr.py

@@ -484,7 +484,6 @@ def _start_julia_daemon(
         return
 
     s = "import Pkg;"
-    s += 'Pkg.add("DaemonMode");'
     if need_install:
         s += "Pkg.instantiate();"
         s += "Pkg.update();"