refactor: automate erasing variables in uninstall

README.md

@@ -281,7 +281,7 @@ end
 
 ## Uninstalling
 
-You want to know how to uninstall Fisher and everything you've installed with it from your system. This command will purge all packages, cache, configuration and related files—all in the same session.
+You want to know how to uninstall Fisher and everything you've installed with it from your system. This command will purge all packages, cache, configuration and related files.
 
 ```fish
 fisher self-uninstall

fisher.fish

@@ -188,10 +188,9 @@ function _fisher_self_uninstall
         command rm -Rf $file 2>/dev/null
     end | command sed "s|$HOME|~|" >&2
 
-    set -e fisher_cache
-    set -e fisher_config
-    set -e fisher_path
-    set -e fisher_version
+    for name in (set -n | command awk '/^fisher_/')
+        set -e "$name"
+    end
 
     complete -c fisher --erase
     functions -e (functions -a | command awk '/^_fisher/') fisher