Remove unused exception parameter from fbandroid/libraries/fbjni/test…

…/jni/inter_dso_exception_test_2/Test.cpp

Summary:
`-Wunused-exception-parameter` has identified an unused exception parameter. This diff removes it.

This:
```
try {
    ...
} catch (exception& e) {
    // no use of e
}
```
should instead be written as
```
} catch (exception&) {
```

If the code compiles, this is safe to land.

Reviewed By: dmm-fb

Differential Revision: D60515202

fbshipit-source-id: 9e1552ed8a7dc2530d3efbf457ed9abcc16434a1

test/jni/inter_dso_exception_test_2/Test.cpp

@@ -26,7 +26,7 @@ bool inter_dso_exception_test_2b() {
   try {
     inter_dso_exception_test_1();
     return false;
-  } catch (const facebook::jni::JniException& ex) {
+  } catch (const facebook::jni::JniException&) {
     return true;
   } catch (...) {
     return false;

test/jni/primitive_array_tests.cpp

@@ -182,27 +182,27 @@ jboolean testIndexOutOfBoundsInRegions(alias_ref<jclass>) {
   try {
     auto buf = array->getRegion(TOO_MUCH, N);
     EXPECT(false);
-  } catch (JniException& ex) {
+  } catch (JniException&) {
   }
 
   try {
     auto buf = array->getRegion(NEGATIVE, N);
     EXPECT(false);
-  } catch (JniException& ex) {
+  } catch (JniException&) {
   }
 
   try {
     auto vec = std::vector<jint>(TOO_MUCH);
     array->setRegion(0, vec.size(), vec.data());
     EXPECT(false);
-  } catch (JniException& ex) {
+  } catch (JniException&) {
   }
 
   try {
     auto vec = std::vector<jint>(1);
     array->setRegion(NEGATIVE, vec.size(), vec.data());
     EXPECT(false);
-  } catch (JniException& ex) {
+  } catch (JniException&) {
   }
 
   return JNI_TRUE;