Masu: Remove heading block specific font rule (#6885)

* Masu: Remove heading block specific font specification

* Revert changes in package-lock.json

masu/theme.json

@@ -47,14 +47,7 @@
 			"wideSize": "1720px"
 		},
 		"spacing": {
-			"units": [
-				"%",
-				"px",
-				"em",
-				"rem",
-				"vh",
-				"vw"
-			]
+			"units": ["%", "px", "em", "rem", "vh", "vw"]
 		},
 		"typography": {
 			"fluid": true,
@@ -274,7 +267,6 @@
 			},
 			"core/heading": {
 				"typography": {
-					"fontFamily": "var(--wp--preset--font-family--libre-franklin)",
 					"fontWeight": "700"
 				}
 			},