- Added delete insulin sample doc

Author: GGGava

docs/deleteInsulinDeliverySample.md

@@ -0,0 +1,33 @@
+# deleteInsulinDeliverySample
+
+Delete a insulin delivery value from HealthKit.
+
+`deleteInsulinDeliverySample` accepts an record's UUID string and a callback:
+
+Example input object:
+
+```javascript
+let id = "A11E708A-63A4-42DF-B1E1-F5E2F88B6CA1"
+```
+
+Example usage:
+
+```javascript
+AppleHealthKit.deleteInsulinDeliverySample(
+    id,
+    (err: string, result: HealthValue) => {
+        if (err) {
+            console.log(err)
+            return
+        }
+        // sample successfully deleted
+      console.log(result)
+    },
+)
+```
+
+Example output (1 if deleted):
+
+```json
+1
+```