diff --git a/src/commands/debug.rs b/src/commands/debug.rs
index d5f84afa49..9562aee38e 100644
--- a/src/commands/debug.rs
+++ b/src/commands/debug.rs
@@ -18,7 +18,6 @@ impl WholeStreamCommand for Debug {
     }
 
     fn signature(&self) -> Signature {
-        // TODO: Signature?
         Signature::build("debug")
     }
 }
diff --git a/src/commands/ps.rs b/src/commands/ps.rs
index 4d4cfb93d6..804fd99d3e 100644
--- a/src/commands/ps.rs
+++ b/src/commands/ps.rs
@@ -20,7 +20,6 @@ impl WholeStreamCommand for PS {
     }
 
     fn signature(&self) -> Signature {
-        // TODO: Signature?
         Signature::build("ps")
     }
 }
diff --git a/src/commands/shells.rs b/src/commands/shells.rs
index 5b7528bc4f..9aa65bdfc1 100644
--- a/src/commands/shells.rs
+++ b/src/commands/shells.rs
@@ -19,7 +19,6 @@ impl WholeStreamCommand for Shells {
     }
 
     fn signature(&self) -> Signature {
-        // TODO: Signature?
         Signature::build("shells")
     }
 }
diff --git a/src/commands/sort_by.rs b/src/commands/sort_by.rs
index 2c22728127..52d97a5952 100644
--- a/src/commands/sort_by.rs
+++ b/src/commands/sort_by.rs
@@ -18,7 +18,6 @@ impl WholeStreamCommand for SortBy {
     }
 
     fn signature(&self) -> Signature {
-        // TODO: Signature?
         Signature::build("sort-by")
     }
 }