diff --git a/Socialmetrica.package/TweetsCollection.class/instance/ifEmpty..st b/Socialmetrica.package/TweetsCollection.class/instance/ifEmpty..st
deleted file mode 100644
index 7b535ff..0000000
--- a/Socialmetrica.package/TweetsCollection.class/instance/ifEmpty..st
+++ /dev/null
@@ -1,9 +0,0 @@
-accessing
-ifEmpty: aBlock
-	"Evaluate the given block, answering its value if the receiver is empty, otherwise answer the receiver."
-
-	"Note that the fact that this method returns its receiver in case the receiver is not empty allows one to write expressions like the following ones: self classifyMethodAs: (myProtocol ifEmpty: ['As yet unclassified'])"
-
-	^ self isEmpty
-		ifTrue: [ aBlock value ]
-		ifFalse: [ self ]
\ No newline at end of file
diff --git a/Socialmetrica.package/TweetsCollection.class/instance/isEmpty.st b/Socialmetrica.package/TweetsCollection.class/instance/isEmpty.st
deleted file mode 100644
index b98b686..0000000
--- a/Socialmetrica.package/TweetsCollection.class/instance/isEmpty.st
+++ /dev/null
@@ -1,5 +0,0 @@
-accessing
-isEmpty
-	"Answer whether the receiver contains any elements."
-
-	^self size = 0
\ No newline at end of file