remove "APL scalars" from primitive settings blocks

src/blocks.js

@@ -1432,8 +1432,7 @@ SyntaxElementMorph.prototype.labelPart = function (spec) {
                     'flat line ends' : ['flat line ends'],
                     'log pen vectors' : ['log pen vectors'],
                     'video capture' : ['video capture'],
-                    'mirror video' : ['mirror video'],
-                    '§_APL scalars' : ['APL scalars']
+                    'mirror video' : ['mirror video']
                 },
                 true
             );