removes objectives section

was always a bit quirky, overlaps with goals and agenda, just drop it

basics.html

@@ -48,15 +48,6 @@
             - cleanup https://git.idiv.de/sc/edu/git-merge-conflict-demo
           </section>
 
-          <section id="intro-objectives" data-markdown>
-            ## objectives
-
-            - teach you to fish
-            - hands-on experience
-            - use version control!
-            - collaborate!
-          </section>
-
           <section id="intro-goals" data-markdown>
             ## goals