Update keyboard.json

keyboards/alf/dc60/keyboard.json

@@ -1834,7 +1834,6 @@
                 {"label": "Alt", "matrix": [4, 3], "x": 2.5, "y": 4, "w": 1.5},
                 {"label": "Space", "matrix": [4, 7], "x": 4, "y": 4, "w": 7},
                 {"label": "Fn", "matrix": [4, 11], "x": 11, "y": 4},
-                {"label": "Ctrl", "matrix": [4, 11], "x": 11, "y": 4},
                 {"label": "\u2190", "matrix": [4, 12], "x": 12, "y": 4},
                 {"label": "\u2193", "matrix": [4, 13], "x": 13, "y": 4},
                 {"label": "\u2192", "matrix": [4, 14], "x": 14, "y": 4}