remove js to prepare camera toggeling

observe_nema.html

@@ -505,25 +505,7 @@
     // width of FoV -- will be supplied by FLASK microscope setup.
     var real_width_FoV = 255;
 
-    // init video switching get IDs of video inputs
     
-    var deviceIDs = [];
-
-    navigator.mediaDevices
-        .enumerateDevices()
-        .then((devices) => {
-          devices.forEach((device) => {
-            if (device.kind=="videoinput"){
-            deviceIDs.push(device.deviceId);
-            }
-            console.log(`${device.kind}: ${device.label} id = ${device.deviceId}`);
-          });
-        })
-        .catch((err) => {
-          console.error(`${err.name}: ${err.message}`);
-        });
-
-    // toggle between cameras
 
 
     // init drawing