remove unnecessary .tobe(true) in unit tests.

Author: lukeina2z

packages/instrumentation-aws-sdk/test/stepfunctions.test.ts

@@ -67,7 +67,7 @@ describe('SFN', () => {
       expect(
         ATTR_AWS_STEP_FUNCTIONS_STATE_MACHINE_ARN in
           stateMachineAttributeSpan.attributes
-      ).toBe(true);
+      );
       expect(
         stateMachineAttributeSpan.attributes[
           ATTR_AWS_STEP_FUNCTIONS_STATE_MACHINE_ARN
@@ -102,7 +102,7 @@ describe('SFN', () => {
       const activityAttributeSpan = getActivityAttributeSpans[0];
       expect(
         ATTR_AWS_STEP_FUNCTIONS_ACTIVITY_ARN in activityAttributeSpan.attributes
-      ).toBe(true);
+      );
       expect(
         activityAttributeSpan.attributes[ATTR_AWS_STEP_FUNCTIONS_ACTIVITY_ARN]
       ).toBe(activityArn);