Class comment in the header.

Signal/test/util/CryptoToolsTest.h

@@ -1,5 +1,7 @@
 #import <XCTest/XCTest.h>
 
+//This test class covers CryptoTools.h - the wrapper around all core crypto library.
+
 @interface CryptoToolsTest : XCTestCase
 
 @end

Signal/test/util/CryptoToolsTest.m

@@ -3,8 +3,6 @@
 #import "CryptoTools.h"
 #import "TestUtil.h"
 
-//This test class covers CryptoTools.h - the accessor class for the core crypto library.
-
 @implementation CryptoToolsTest
 -(void) testIsEqualToData_TimingSafe {
     test([[NSMutableData dataWithLength:0] isEqualToData_TimingSafe:[NSMutableData dataWithLength:0]]);