Remove block attribute from any theme not defining nav menu locations (#6730)

disco/parts/header.html

@@ -8,7 +8,7 @@
 	<!-- /wp:group --></div>
 	<!-- /wp:group -->
 	
-	<!-- wp:navigation {"__unstableLocation":"primary","overlayBackgroundColor":"background","overlayTextColor":"foreground","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"left","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
+	<!-- wp:navigation {"overlayBackgroundColor":"background","overlayTextColor":"foreground","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"left","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
 	<!-- /wp:group -->
 
 	<!-- wp:spacer {"height":"2rem"} -->

pixl/parts/header.html

@@ -15,7 +15,7 @@
             </div>
             <!-- /wp:group -->
 
-            <!-- wp:navigation {"__unstableLocation":"primary","overlayBackgroundColor":"background","overlayTextColor":"foreground","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"left","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /-->
+            <!-- wp:navigation {"overlayBackgroundColor":"background","overlayTextColor":"foreground","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"left","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /-->
         </div>
         <!-- /wp:group -->
     </div>

spearhead-blocks/parts/header.html

@@ -10,7 +10,7 @@
 <!-- /wp:group --></div>
 <!-- /wp:group -->
 
-<!-- wp:navigation {"__unstableLocation":"primary","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
+<!-- wp:navigation {"layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
 <!-- /wp:group --></div>
 <!-- /wp:group -->
 

stewart/parts/header-title-nav.html

@@ -6,6 +6,6 @@
 <!-- wp:site-title /--></div>
 <!-- /wp:group -->
 
-<!-- wp:navigation {"__unstableLocation":"primary","layout":{"type":"flex","orientation":"horizontal"}} /--></div>
+<!-- wp:navigation {"layout":{"type":"flex","orientation":"horizontal"}} /--></div>
 <!-- /wp:group --></div>
 <!-- /wp:group -->

stewart/patterns/header-traditional-background.php

@@ -15,7 +15,7 @@
 <!-- wp:site-title /--></div>
 <!-- /wp:group -->
 
-<!-- wp:navigation {"__unstableLocation":"primary","layout":{"type":"flex","orientation":"horizontal"}} /--></div>
+<!-- wp:navigation {"layout":{"type":"flex","orientation":"horizontal"}} /--></div>
 <!-- /wp:group -->
 
 <!-- wp:spacer {"height":100} -->

stewart/patterns/header-traditional.php

@@ -15,6 +15,6 @@
 <!-- wp:site-title /--></div>
 <!-- /wp:group -->
 
-<!-- wp:navigation {"__unstableLocation":"primary","layout":{"type":"flex","orientation":"horizontal"}} /--></div>
+<!-- wp:navigation {"layout":{"type":"flex","orientation":"horizontal"}} /--></div>
 <!-- /wp:group --></div>
 <!-- /wp:group -->