[Bootstrap] Removed now unnecessary line

This commit removes a line that sets all files in `~/.local/bin' as
executables. It was aimed at scripts exported from `bin.org' but it is
no longer required since the executability of these tangled files is
enforced by the shebang header argument added in commit 8f35b85ef1

org/config/installation.org

@@ -399,12 +399,6 @@
      <<generate-tangle()>>
    #+END_SRC
 
-   Let’s also make  sure the exported files that are  supposed to be executables
-   are indeed executables.
-   #+BEGIN_SRC fish
-     find ~/.local/bin -type f -exec chmod +x {} +
-   #+END_SRC
-
 ** Setting up Emacs: Installing Spacemacs
    :PROPERTIES:
    :CUSTOM_ID: Execute_bootstrap-Setting_up_Emacs:_Installing_Spacemacs-0b3d44b2