diff --git a/src/NewTools-DocumentBrowser/MicAbstractBlock.extension.st b/src/NewTools-DocumentBrowser/MicAbstractBlock.extension.st
index 198d77e..344d770 100644
--- a/src/NewTools-DocumentBrowser/MicAbstractBlock.extension.st
+++ b/src/NewTools-DocumentBrowser/MicAbstractBlock.extension.st
@@ -13,11 +13,6 @@ MicAbstractBlock >> contents [
 Select the whole document for editing'
 ]
 
-{ #category : '*NewTools-DocumentBrowser' }
-MicAbstractBlock >> isHeader [
-	^ false
-]
-
 { #category : '*NewTools-DocumentBrowser' }
 MicAbstractBlock >> loadMicrodown [
 	"polymorphic with resource references"
diff --git a/src/NewTools-DocumentBrowser/MicHeaderBlock.extension.st b/src/NewTools-DocumentBrowser/MicHeaderBlock.extension.st
deleted file mode 100644
index 5294cd5..0000000
--- a/src/NewTools-DocumentBrowser/MicHeaderBlock.extension.st
+++ /dev/null
@@ -1,6 +0,0 @@
-Extension { #name : 'MicHeaderBlock' }
-
-{ #category : '*NewTools-DocumentBrowser' }
-MicHeaderBlock >> isHeader [
-	^ true
-]