more css pruning

blank-canvas-blocks/assets/ponyfill.css

@@ -298,19 +298,11 @@ h1, h2, h3, h4, h5, h6 {
 	border-color: var(--wp--custom--button--color--hover-background);
 }
 
-.wp-block-gallery {
-	margin: var(--wp--custom--gallery--margin);
-}
-
 .wp-block-gallery .blocks-gallery-image figcaption,
 .wp-block-gallery .blocks-gallery-item figcaption {
 	font-size: var(--wp--custom--gallery--caption--font-size);
 }
 
-.wp-block-gallery.alignfull .blocks-gallery-grid {
-	width: 100%;
-}
-
 .wp-block-image {
 	/* 
 	From what I can tell the below are styles regularly used by themes

blank-canvas-blocks/experimental-theme.json

@@ -138,7 +138,6 @@
 							"fontWeight": "400"
 						}
 				"gallery": {
-					"margin": "0 auto",
 					"caption": {
 						"fontSize": "var(--wp--preset--font-size--small)"
 					}

blank-canvas-blocks/sass/blocks/_gallery.scss

@@ -1,18 +1,8 @@
 .wp-block-gallery {
-
-	margin: var(--wp--custom--gallery--margin);
-
 	.blocks-gallery-image,
 	.blocks-gallery-item {
-
 		figcaption {
 			font-size: var(--wp--custom--gallery--caption--font-size);
 		}
 	}
-
-	&.alignfull {
-		.blocks-gallery-grid {
-			width: 100%;
-		}
-	}
 }