Remove dashicon classes

[Aljullu]

Fixes #2846.

How to test the changes in this Pull Request:

Testing means ensuring there are no visual regressions in the modified blocks:

1. Cart: verify coupon chip close icon looks as it did.
   
2. Attribute Filter: set Query Type: AND, Display Style: Dropdown. Then, select a value and check that the cross icon still shows up correct.
   

[github-actions]

Size Change: -285 B (0%)

Total Size: 1.59 MB

Filename	Size	Change
build/active-filters-frontend.js	8.43 kB	-40 B (0%)
build/active-filters.js	8.72 kB	-26 B (0%)
build/all-products-frontend.js	41.3 kB	-28 B (0%)
build/all-products.js	24.9 kB	-43 B (0%)
build/attribute-filter-frontend.js	17.7 kB	-30 B (0%)
build/attribute-filter.js	12.3 kB	-19 B (0%)
build/cart-frontend.js	64.1 kB	-53 B (0%)
build/cart.js	33.4 kB	-18 B (0%)
build/checkout-frontend.js	80.9 kB	+70 B (0%)
build/checkout.js	38.9 kB	-18 B (0%)
build/single-product-frontend.js	44.1 kB	-28 B (0%)
build/single-product.js	18.3 kB	-31 B (0%)
build/style-rtl.css	18.1 kB	-11 B (0%)
build/style.css	18.1 kB	-10 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
build/all-reviews-legacy.js	9.29 kB	0 B
build/all-reviews.js	9.6 kB	0 B
build/block-error-boundary-legacy.js	775 B	0 B
build/block-error-boundary.js	774 B	0 B
build/blocks-legacy.js	3.21 kB	0 B
build/blocks.js	3.22 kB	0 B
build/custom-select-control-style-legacy.js	782 B	0 B
build/custom-select-control-style.js	783 B	0 B
build/editor-legacy-rtl.css	12.5 kB	0 B
build/editor-legacy.css	12.5 kB	0 B
build/editor-rtl.css	13.5 kB	0 B
build/editor.css	13.5 kB	0 B
build/featured-category-legacy.js	7.25 kB	0 B
build/featured-category.js	7.59 kB	0 B
build/featured-product-legacy.js	9.51 kB	0 B
build/featured-product.js	9.85 kB	0 B
build/handpicked-products-legacy.js	6.91 kB	0 B
build/handpicked-products.js	7.24 kB	0 B
build/price-filter-frontend.js	14.1 kB	0 B
build/price-filter.js	10.1 kB	0 B
build/product-best-sellers-legacy.js	6.99 kB	0 B
build/product-best-sellers.js	7.3 kB	0 B
build/product-categories-legacy.js	3.22 kB	0 B
build/product-categories.js	3.22 kB	0 B
build/product-category-legacy.js	7.91 kB	0 B
build/product-category.js	8.25 kB	0 B
build/product-list-style-legacy.js	775 B	0 B
build/product-new-legacy.js	7.14 kB	0 B
build/product-new.js	7.47 kB	0 B
build/product-on-sale-legacy.js	7.52 kB	0 B
build/product-on-sale.js	7.87 kB	0 B
build/product-search-legacy.js	3.13 kB	0 B
build/product-search.js	3.43 kB	0 B
build/product-tag-legacy.js	6.08 kB	0 B
build/product-tag.js	6.39 kB	0 B
build/product-top-rated-legacy.js	7.11 kB	0 B
build/product-top-rated.js	7.44 kB	0 B
build/products-by-attribute-legacy.js	7.88 kB	0 B
build/products-by-attribute.js	8.2 kB	0 B
build/reviews-by-category-legacy.js	11.3 kB	0 B
build/reviews-by-category.js	11.6 kB	0 B
build/reviews-by-product-legacy.js	12.8 kB	0 B
build/reviews-by-product.js	13.1 kB	0 B
build/reviews-frontend-legacy.js	8.16 kB	0 B
build/reviews-frontend.js	9 kB	0 B
build/snackbar-notice-style-legacy.js	778 B	0 B
build/snackbar-notice-style.js	779 B	0 B
build/spinner-style-legacy.js	771 B	0 B
build/spinner-style.js	772 B	0 B
build/style-legacy-rtl.css	5.56 kB	0 B
build/style-legacy.css	5.57 kB	0 B
build/vendors-legacy.js	367 kB	0 B
build/vendors-style-legacy-rtl.css	1.03 kB	0 B
build/vendors-style-legacy.css	1.03 kB	0 B
build/vendors-style-legacy.js	102 B	0 B
build/vendors-style-rtl.css	1.03 kB	0 B
build/vendors-style.css	1.03 kB	0 B
build/vendors-style.js	102 B	0 B
build/vendors.js	415 kB	0 B
build/wc-blocks-data.js	7.09 kB	0 B
build/wc-blocks-middleware.js	932 B	0 B
build/wc-blocks-registry.js	2.19 kB	0 B
build/wc-payment-method-bacs.js	791 B	0 B
build/wc-payment-method-cheque.js	794 B	0 B
build/wc-payment-method-paypal.js	830 B	0 B
build/wc-payment-method-stripe.js	11.9 kB	0 B
build/wc-settings.js	2.14 kB	0 B
build/wc-shared-context.js	1.51 kB	0 B

_{compressed-size-action}

[nerrad]

Looks great 👍 - thanks for taking care of this!