drop 0 from declaration (golint)

examples/atomic-counters/atomic-counters.go

@@ -15,7 +15,7 @@ func main() {
 
     // We'll use an unsigned integer to represent our
     // (always-positive) counter.
-    var ops uint64 = 0
+    var ops uint64
 
     // To simulate concurrent updates, we'll start 50
     // goroutines that each increment the counter about

examples/mutexes/mutexes.go

@@ -23,8 +23,8 @@ func main() {
 
     // We'll keep track of how many read and write
     // operations we do.
-    var readOps uint64 = 0
-    var writeOps uint64 = 0
+    var readOps uint64
+    var writeOps uint64
 
     // Here we start 100 goroutines to execute repeated
     // reads against the state, once per millisecond in

examples/stateful-goroutines/stateful-goroutines.go

@@ -37,8 +37,8 @@ type writeOp struct {
 func main() {
 
     // As before we'll count how many operations we perform.
-    var readOps uint64 = 0
-    var writeOps uint64 = 0
+    var readOps uint64
+    var writeOps uint64
 
     // The `reads` and `writes` channels will be used by
     // other goroutines to issue read and write requests,