Remove redundant projectile-ignored-projects entries

/tmp and ~/.emacs.d/.local are already covered by our
projectile-ignored-project-function (doom-project-ignored-p).

core/core-projects.el

@@ -35,7 +35,7 @@ debian, and derivatives). On most it's 'fd'.")
         projectile-globally-ignored-file-suffixes '(".elc" ".pyc" ".o")
         projectile-kill-buffers-filter 'kill-only-files
         projectile-known-projects-file (concat doom-cache-dir "projectile.projects")
-        projectile-ignored-projects (list "~/" temporary-file-directory)
+        projectile-ignored-projects '("~/")
         projectile-ignored-project-function #'doom-project-ignored-p)
 
   (global-set-key [remap evil-jump-to-tag] #'projectile-find-tag)