removed registration.js from contacts

get rid of warning "address already exists"

views/DE/account/contact.pug

@@ -52,10 +52,10 @@ html(lang="de")
                 input#name(class="form-control" type="text" name="name" placeholder="Name")
             div(class="form-group")
                 input#inputEmail(name="inputEmail", type="email", class="form-control", placeholder="E-Mail-Adresse*", maxlength="45" required)
-                span#emailWarning(class='warning')
             div(class="form-group")
                 textarea#message(class="form-control" name="message" placeholder="Nachricht" rows="14")
-            div(class="form-group") <button class="btn btn-primary" type="submit" style="background-color: #8a348b;">SENDEN</button>
+            div(class="form-group")
+                input#submitBtn(class="btn btn-primary" type="submit" style="background-color: #8a348b;" value="SENDEN")
     div(class="contact-clean" style="background-color: rgb(234,234,234);padding: 80px;padding-top: 0px;")
         form(method="POST")
             p(style="margin-top: 25px;") <strong>Hochschule für Technik Stuttgart</strong><br/>Institut für Angewandte Forschung<br/>Innovative Hochschule - Projekt M4_LAB<br/>Schellingstr. 24<br/>70174 Stuttgart<br/>Deutschland<br/><br/><a href="mailto:support-transfer@hft-stuttgart.de">support-transfer@hft-stuttgart.de</a><br/><br/><a href="https://www.hft-stuttgart.de/">www.hft-stuttgart.de</a> / <a href="https://www.hft-stuttgart.de/M4LAB">www.hft-stuttgart.de/M4LAB</a><br/>
@@ -77,5 +77,4 @@ html(lang="de")
     // Bootstrap
     script(src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous")
     // M4_LAB
-    script(src="/js/registration.js")
     script(src="/js/headfoot.js")