Try removing block breadcrumbs

assets/stylesheets/_z-index.scss

@@ -8,7 +8,6 @@ $z-layers: (
 	".block-editor-block-list__block {core/image aligned wide or fullwide}": 20,
 	".block-library-classic__toolbar": 10,
 	".block-editor-block-list__layout .reusable-block-indicator": 1,
-	".block-editor-block-list__breadcrumb": 2,
 	".components-form-toggle__input": 1,
 	".components-panel__header.edit-post-sidebar__panel-tabs": -1,
 	".edit-post-sidebar .components-panel": -2,
@@ -59,7 +58,6 @@ $z-layers: (
 	// The toolbar, when contextual, should be above any adjacent nested block click overlays.
 	".block-editor-block-list__layout .reusable-block-edit-panel": 121,
 	".block-editor-block-contextual-toolbar": 121,
-	".editor-inner-blocks .block-editor-block-list__breadcrumb": 122,
 
 	// The block mover, particularly in nested contexts,
 	// should overlap most block content.

packages/block-editor/src/components/block-list/block.js

@@ -41,7 +41,6 @@ import BlockInvalidWarning from './block-invalid-warning';
 import BlockCrashWarning from './block-crash-warning';
 import BlockCrashBoundary from './block-crash-boundary';
 import BlockHtml from './block-html';
-import BlockBreadcrumb from './breadcrumb';
 import BlockContextualToolbar from './block-contextual-toolbar';
 import BlockMultiControls from './multi-controls';
 import BlockMobileToolbar from './block-mobile-toolbar';
@@ -372,8 +371,6 @@ function BlockListBlock( {
 		! showEmptyBlockSideInserter &&
 		! isPartOfMultiSelection &&
 		! isTypingWithinBlock;
-	const shouldShowBreadcrumb =
-		! isFocusMode && isHovered && ! isEmptyDefaultBlock;
 	const shouldShowContextualToolbar =
 		! hasFixedToolbar &&
 		! showEmptyBlockSideInserter &&
@@ -496,14 +493,6 @@ function BlockListBlock( {
 						onDragEnd={ onDragEnd }
 					/>
 				) }
-				{ shouldShowBreadcrumb && (
-					<BlockBreadcrumb
-						clientId={ clientId }
-						isHidden={
-							! ( isHovered || isSelected ) || hoverArea !== ( isRTL ? 'right' : 'left' )
-						}
-					/>
-				) }
 				{ ( shouldShowContextualToolbar || isForcingContextualToolbar.current ) && (
 					<BlockContextualToolbar
 						// If the toolbar is being shown because of being forced

packages/block-editor/src/components/block-list/style.scss

@@ -447,11 +447,6 @@
 			}
 		}
 
-		// If the block movers are visible, push the breadcrumb down to make room for them.
-		.block-editor-block-mover.is-visible + .block-editor-block-list__breadcrumb {
-			top: (-$block-padding - $block-left-border-width - ($grid-size-small / 2));
-		}
-
 		// Align block toolbar to floated content.
 		@include break-mobile() {
 			.block-editor-block-toolbar {
@@ -481,10 +476,6 @@
 
 	// Full-wide
 	&[data-align="full"] {
-		// Position hover label on the left for the top level block.
-		> .block-editor-block-list__block-edit > .block-editor-block-list__breadcrumb {
-			left: 0;
-		}
 
 		// Compensate for main container padding and subtract border.
 		@include break-small() {
@@ -988,58 +979,6 @@
 	}
 }
 
-
-/**
- * Hover label
- */
-
-.block-editor-block-list__breadcrumb {
-	position: absolute;
-	line-height: 1;
-	z-index: z-index(".block-editor-block-list__breadcrumb");
-
-	// Position in the top left of the border.
-	left: -$block-padding - $block-left-border-width;
-	top: (($block-padding * -2) - $block-left-border-width);
-
-	.components-toolbar {
-		border: none;
-		line-height: 1;
-		font-family: $default-font;
-		font-size: 11px;
-		padding: 4px 4px;
-		background: $light-gray-500;
-		color: $dark-gray-900;
-
-		.is-dark-theme & {
-			background: $dark-gray-600;
-			color: $white;
-		}
-
-		// Animate in
-		.block-editor-block-list__block:hover & {
-			opacity: 0;
-			@include edit-post__fade-in-animation(60ms, 0.5s);
-		}
-	}
-
-	// Position this above the toolbar of parent blocks.
-	.editor-inner-blocks & {
-		z-index: z-index(".editor-inner-blocks .block-editor-block-list__breadcrumb");
-	}
-
-	// Remove negative left breadcrumb position for left aligned blocks.
-	[data-align="left"] & {
-		left: 0;
-	}
-
-	// Right-align the breadcrumb for right-aligned blocks.
-	[data-align="right"] & {
-		left: auto;
-		right: 0;
-	}
-}
-
 .block-editor-block-list__descendant-arrow::before {
 	content: "→";
 	display: inline-block;

packages/block-library/src/classic/editor.scss

@@ -254,11 +254,6 @@ div[data-type="core/freeform"] {
 		border-left-color: transparent;
 	}
 
-	// Don't show block type label for classic block
-	&.is-hovered .block-editor-block-list__breadcrumb {
-		display: none;
-	}
-
 	.editor-block-contextual-toolbar + div {
 		margin-top: 0;
 		padding-top: 0;

packages/block-library/src/columns/editor.scss

@@ -158,15 +158,6 @@ div.block-core-columns.is-vertically-aligned-bottom {
 	justify-content: flex-end;
 }
 
-
-/**
- * Fixes single Column breadcrumb to RHS of Block boundary
- */
-[data-type="core/column"] > .editor-block-list__block-edit > .editor-block-list__breadcrumb {
-	right: 0;
-	left: auto;
-}
-
 /**
  * Make single Column overlay not extend past boundaries of parent
  */