Remove identifier that causes warnings under OpenJDK 8 compiler

Bug: 24494019
Change-Id: I4cdf6c594773cd66367671cd8f9b63cd9d852730
diff --git a/tests/tests/widget/src/android/widget/cts/ImageSwitcherTest.java b/tests/tests/widget/src/android/widget/cts/ImageSwitcherTest.java
index eb75557..95f8d0c 100644
--- a/tests/tests/widget/src/android/widget/cts/ImageSwitcherTest.java
+++ b/tests/tests/widget/src/android/widget/cts/ImageSwitcherTest.java
@@ -170,7 +170,7 @@
                 if (target != null) {
                     target.close();
                 }
-            } catch (IOException _) {
+            } catch (IOException ignored) {
                 // Ignore the IOException.
             }
         }
diff --git a/tests/tests/widget/src/android/widget/cts/ImageViewTest.java b/tests/tests/widget/src/android/widget/cts/ImageViewTest.java
index aa1df34..8b50e2c 100644
--- a/tests/tests/widget/src/android/widget/cts/ImageViewTest.java
+++ b/tests/tests/widget/src/android/widget/cts/ImageViewTest.java
@@ -95,7 +95,7 @@
                 if (target != null) {
                     target.close();
                 }
-            } catch (IOException _) {
+            } catch (IOException ignored) {
                 // Ignore the IOException.
             }
         }
diff --git a/tests/tests/widget/src/android/widget/cts/MediaControllerTest.java b/tests/tests/widget/src/android/widget/cts/MediaControllerTest.java
index 49bc767..9f3aa55 100644
--- a/tests/tests/widget/src/android/widget/cts/MediaControllerTest.java
+++ b/tests/tests/widget/src/android/widget/cts/MediaControllerTest.java
@@ -182,7 +182,7 @@
                 if (target != null) {
                     target.close();
                 }
-            } catch (final IOException _) {
+            } catch (final IOException ignored) {
                 // Ignore the IOException.
             }
         }
diff --git a/tests/tests/widget/src/android/widget/cts/RemoteViewsTest.java b/tests/tests/widget/src/android/widget/cts/RemoteViewsTest.java
index 58738a1..18bac7e 100644
--- a/tests/tests/widget/src/android/widget/cts/RemoteViewsTest.java
+++ b/tests/tests/widget/src/android/widget/cts/RemoteViewsTest.java
@@ -633,7 +633,7 @@
                 if (target != null) {
                     target.close();
                 }
-            } catch (IOException _) {
+            } catch (IOException ignored) {
                 // Ignore the IOException.
             }
         }