Remove sprunge.us as provider

This is due to rupa/sprunge#45

README.org

@@ -173,14 +173,14 @@ webpaste first and then just read the documentation by running this:
   (describe-function 'webpaste--provider)
 #+end_src
 
-* TODO Providers to implement [7/10]
+* TODO Providers to implement [6/10]
  - [X] ptpb.pw
  - [X] ix.io
  - [X] dpaste.com
- - [X] sprunge.us
  - [X] dpaste.de
  - [X] gist.github.com
  - [X] paste.pound-python.org
  - [ ] paste.debian.net
  - [ ] bpaste.net
  - [ ] eval.in
+ - [ ] sprunge.us (removed due to [[https://github.com/rupa/sprunge/issues/45][sprunge#45]] that yields 500s)

tests/integration/test-webpaste-providers.el

@@ -36,15 +36,6 @@
   (expect (spy-calls-count 'webpaste--paste-text) :to-equal 0))
 
 
- (it
-  "local: can paste with sprunge.us"
-
-  (funcall (webpaste--get-provider-by-name "sprunge.us") paste-message :sync t)
-
-  (expect (spy-calls-count 'webpaste--return-url) :to-equal 1)
-  (expect (spy-calls-count 'webpaste--paste-text) :to-equal 0))
-
-
  (it
   "ci: can paste with dpaste.com"
 

webpaste.el

@@ -103,13 +103,6 @@ This uses `browse-url-generic' to open URLs."
                       (nix-mode . "nix"))
      :success-lambda webpaste--providers-success-returned-string)
 
-    ("sprunge.us"
-     :uri "http://sprunge.us/"
-     :post-field "sprunge"
-     :lang-uri-separator "?"
-     :lang-overrides ((emacs-lisp-mode . "clojure"))
-     :success-lambda webpaste--providers-success-returned-string)
-
     ("dpaste.com"
      :uri "http://dpaste.com/api/v2/"
      :post-data (("title" . "")