diff --git a/lib/pigeon.rb b/lib/pigeon.rb
index 2111af6..4012e8f 100644
--- a/lib/pigeon.rb
+++ b/lib/pigeon.rb
@@ -266,12 +266,6 @@ module Pigeon
         return b32_decode(string[1..].gsub(FOOTERS_REGEX, ""))
       end
     end
-
-    def self.blob_multihash?(unknown)
-      (unknown.is_a?(String) &&
-       unknown.length == 60 &&
-       (unknown[0] == BLOB_SIGIL))
-    end
   end
 end
 
diff --git a/lib/pigeon/message.rb b/lib/pigeon/message.rb
index 8324fd9..111f755 100644
--- a/lib/pigeon/message.rb
+++ b/lib/pigeon/message.rb
@@ -29,9 +29,6 @@ module Pigeon
       @depth = depth
       @kind = kind
       @prev = prev || Pigeon::NOTHING
-      unless lipmaa.is_a?(String)
-        raise "Bad lipmaa value: #{lipmaa}"
-      end
       @lipmaa = lipmaa
       @signature = signature
     end
diff --git a/lib/pigeon/storage.rb b/lib/pigeon/storage.rb
index 7886c17..28ac3fb 100644
--- a/lib/pigeon/storage.rb
+++ b/lib/pigeon/storage.rb
@@ -73,10 +73,6 @@ module Pigeon
 
     # `nil` means "none"
     def get_message_count_for(mhash)
-      unless mhash.is_a?(String)
-        raise "Expected string, got #{mhash.class}"
-      end # Delete later
-
       read { store[COUNT_INDEX_NS][mhash] || 0 }
     end
 
@@ -97,10 +93,6 @@ module Pigeon
     end
 
     def get_message_by_depth(multihash, depth)
-      unless multihash.is_a?(String)
-        raise "Expected string, got #{multihash.class}"
-      end # Delete later
-
       # Map<[multihash(str), depth(int)], Signature>
       key = [multihash, depth].join(".")
       read { store[MESSAGE_BY_DEPTH_NS][key] }