diff --git a/src/sync/atomic/value.go b/src/sync/atomic/value.go
index 30abf72634..1fc1f681f2 100644
--- a/src/sync/atomic/value.go
+++ b/src/sync/atomic/value.go
@@ -9,7 +9,6 @@ import (
 )
 
 // A Value provides an atomic load and store of a consistently typed value.
-// Values can be created as part of other data structures.
 // The zero value for a Value returns nil from Load.
 // Once Store has been called, a Value must not be copied.
 //
diff --git a/src/sync/cond.go b/src/sync/cond.go
index c070d9d84e..14e2f6b24d 100644
--- a/src/sync/cond.go
+++ b/src/sync/cond.go
@@ -17,7 +17,6 @@ import (
 // which must be held when changing the condition and
 // when calling the Wait method.
 //
-// A Cond can be created as part of other structures.
 // A Cond must not be copied after first use.
 type Cond struct {
 	noCopy noCopy
diff --git a/src/sync/mutex.go b/src/sync/mutex.go
index 506b23f6ff..1232c629b1 100644
--- a/src/sync/mutex.go
+++ b/src/sync/mutex.go
@@ -19,8 +19,7 @@ import (
 func throw(string) // provided by runtime
 
 // A Mutex is a mutual exclusion lock.
-// Mutexes can be created as part of other structures;
-// the zero value for a Mutex is an unlocked mutex.
+// The zero value for a Mutex is an unlocked mutex.
 //
 // A Mutex must not be copied after first use.
 type Mutex struct {
diff --git a/src/sync/rwmutex.go b/src/sync/rwmutex.go
index 55b69f2bb8..a8607d9167 100644
--- a/src/sync/rwmutex.go
+++ b/src/sync/rwmutex.go
@@ -12,8 +12,7 @@ import (
 
 // An RWMutex is a reader/writer mutual exclusion lock.
 // The lock can be held by an arbitrary number of readers or a single writer.
-// RWMutexes can be created as part of other structures;
-// the zero value for a RWMutex is an unlocked mutex.
+// The zero value for a RWMutex is an unlocked mutex.
 //
 // An RWMutex must not be copied after first use.
 //