Completely remove qlmapper

Dockerfile

@@ -11,8 +11,6 @@ RUN mkdir common-lisp \
 	&& git clone --depth 1 \
 	https://github.com/didierverna/declt common-lisp/declt \
 	&& git clone --depth 1 \
-	https://github.com/xach/qlmapper common-lisp/qlmapper \
-	&& git clone --depth 1 \
 	https://gitlab.lrde.epita.fr/amartin/quickref common-lisp/quickref
 
 # Setup Quicklisp

quickref.asd

 (asdf:defsystem quickref
   :author "Antoine Martin"
-  :depends-on (:quicklisp :alexandria :qlmapper :net.didierverna.declt)
+  :depends-on (:quicklisp :alexandria :net.didierverna.declt)
   :serial t
   :components ((:file "quickref")
 	       (:file "qrmapper")