Remove postgresql-iban from guix.scm

It is actually not used anywhere in the application, and i do not plan
to start using it any time soon.

guix.scm

@@ -116,40 +116,6 @@
       (description "This is an extension for PostgreSQL that provides a uri data type. Advantages over using plain text for storing URIs include: URI syntax checking, functions for extracting URI components, and human-friendly sorting.")
       (license asl2.0))))
 
-(define postgresql-iban
-  (let ((commit "0e533afb4d6bdb5af615d71ee16db9528e501ba6")
-	(revision "1"))
-    (package
-      (name "PostgreSQL-IBAN")
-      (version (git-version "1.0.0" revision commit))
-      (source (origin
-		(method git-fetch)
-		(uri (git-reference
-		       (url "https://github.com/yorickdewid/PostgreSQL-IBAN.git")
-		       (commit commit)))
-		(file-name (git-file-name name version))
-		(sha256
-		  (base32
-		    "1fqjk0amdr3mvhq6n7ig6lxs8xckm6vh5nxm8m1rlar82081agh2"))
-		(patches (search-patches "postgresql-iban-enable-nls.patch"))))
-      (build-system gnu-build-system)
-      (arguments
-	`(#:tests? #f
-	  #:make-flags
-	  (list (string-append "datadir=" (assoc-ref %outputs "out") "/share")
-		(string-append "docdir="(assoc-ref %outputs "out") "/share/doc")
-		(string-append "pkglibdir="(assoc-ref %outputs "out") "/lib")
-		(string-append "bindir=" (assoc-ref %outputs "out") "/bin"))
-	  #:phases
-	  (modify-phases %standard-phases
-			 (delete 'configure))))
-      (inputs
-	`(("postgresql" ,postgresql-15)))
-      (home-page "https://github.com/yorickdewid/PostgreSQL-IBAN")
-      (synopsis "PostgreSQL extension that can verify International Bank Account Numbers")
-      (description "PostgreSQL IBAN extension that can verify International Bank Account Numbers. This ensures that only valid bank account numbers are stored.")
-      (license gpl3+))))
-
 (define postgresql-15/xml
   (package
     (inherit postgresql-15)
@@ -249,7 +215,6 @@
       ("perl" ,perl)
       ("pg-libphonenumber" ,pg-libphonenumber)
       ("pguri" ,pguri)
-      ("PostgreSQL-IBAN" ,postgresql-iban)
       ("postgresql" ,postgresql-15/xml)))
   (synopsis "Simple camping management and booking web application")
   (description "A simple web application to manage small campings and other touristic accomodations in Spain.")