improv(maintenance): Removed some unused assignments and added missing error handling (#4208)

Co-authored-by: Stefano Vozza <svozza@amazon.com>

Author: sdangol

examples/snippets/parameters/testingYourCodeClientHandler.ts

@@ -10,7 +10,8 @@ export const handler = async (
     return {
       value: parameter,
     };
-  } catch (_error) {
+  } catch (error) {
+    console.error('Unable to retrieve secret: ', error);
     return {
       message: 'Unable to retrieve secret',
     };

packages/parameters/tests/unit/BaseProvider.test.ts

@@ -546,9 +546,6 @@ describe('Function: clearCaches', () => {
 describe('Class: GetOptions', () => {
   it('sets the default maxAge when not provided', () => {
     // Prepare
-    const envVarsService = {
-      getParametersMaxAge: vi.fn(),
-    };
     const options = new GetOptions();
 
     // Assess
@@ -559,9 +556,6 @@ describe('Class: GetOptions', () => {
 describe('Class: GetMultipleOptions', () => {
   it('sets throwOnTransformError to false when not provided', () => {
     // Prepare
-    const envVarsService = {
-      getParametersMaxAge: vi.fn(),
-    };
     const options = new GetMultipleOptions();
 
     // Assess