Revert "Add "un/install dev target for linux" to Makefile"

This reverts commit 6b18a110. The file
gets deployed if installed as package or by using -i/--install-helper.

Makefile

@@ -456,9 +456,3 @@ generate_locales:
 
 get_%:
 	@curl -L -X GET --user "api:${API_TOKEN}" "https://www.transifex.com/api/2/project/bitmask/resource/bitmask-desktop/translation/${subst -,_,$*}/?file" > gui/i18n/main_$*.ts
-
-install_dev_linux:
-	@sudo install -m 0755 pkg/pickle/helpers/bitmask-root /usr/bin/bitmask-root
-
-uninstall_dev_linux:
-	@sudo rm -rf /usr/bin/bitmask-root