Fix: Revert focus prs (#8933)

* Revert "feat: Make toolbox and flyout focusable (#8920)"

This reverts commit 5bc83808bf.

* Revert "feat: Make WorkspaceSvg and BlockSvg focusable (#8916)"

This reverts commit d7680cf32e.

core/renderers/common/path_object.ts

@@ -62,7 +62,7 @@ export class PathObject implements IPathObject {
     /** The primary path of the block. */
     this.svgPath = dom.createSvgElement(
       Svg.PATH,
-      {'class': 'blocklyPath', 'tabindex': '-1'},
+      {'class': 'blocklyPath'},
       this.svgRoot,
     );