Do not install dependencies when running tests.

--- a/etc/telega-make.el
+++ b/etc/telega-make.el
@@ -52,7 +52,6 @@
 
 (defun telega-run-tests ()
   "Run telega tests."
-  (telega-ensure-dependencies)
 
   (load "ert")
   (load "test")


--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-EMACS=emacs -Q
+EMACS=emacs -q --no-site-file
 
 SERVER_TARGETS=telega-server install