PageScene: drop spacebar handler from MouseControls

The spacebar branch in onkeydown called switchCameraView; remove it
along with the now-unused switchCameraView callback param/field. Editor
no longer passes that arg into MouseControls' constructor.

frontend/apps/artcraft/app/src/pages/PageScene/engine/editor.ts

@@ -377,7 +377,6 @@ class Editor {
       this.cameraController.freeCamState,
       this.cameraController.lockControls,
       this.cameraController.camera_last_pos,
-      this.cameraController.switchCameraView.bind(this.cameraController),
       this.deleteObject.bind(this),
       this.viewport.canvReference,
       this.mouse,

frontend/apps/artcraft/app/src/pages/PageScene/engine/keybinds_controls.ts

@@ -57,7 +57,6 @@ export class MouseControls {
   camera_last_pos: THREE.Vector3;
   selected: THREE.Object3D[] | undefined;
   orbitControls: OrbitControls | undefined;
-  switchCameraView: Function;
   deleteObject: Function;
   canvReference: HTMLCanvasElement | null = null;
   mouse: THREE.Vector2 | undefined;
@@ -90,7 +89,6 @@ export class MouseControls {
     cameraViewControls: FreeCamControlState | null,
     lockControls: PointerLockControls | undefined,
     camera_last_pos: THREE.Vector3,
-    switchCameraView: Function,
     deleteObject: Function,
     canvReference: HTMLCanvasElement | null,
     mouse: THREE.Vector2 | undefined,
@@ -114,7 +112,6 @@ export class MouseControls {
     this.lockControls = lockControls;
     this.camera_last_pos = camera_last_pos;
     this.selected = [];
-    this.switchCameraView = switchCameraView;
     this.deleteObject = deleteObject;
     this.canvReference = canvReference;
     this.mouse = mouse;
@@ -295,9 +292,6 @@ export class MouseControls {
     } else if (event.key === "f" && this.selected && this.lockControls) {
       this.focus();
       return;
-    } else if (event.key === " ") {
-      this.switchCameraView();
-      return;
     } else if (event.key === "Backspace" || event.key === "Delete") {
       if (this.selected) {
         this.selected.forEach((selected) => {