Drop unneeded catch blocks

Since MissingObjectException and IncorrectObjectTypeException are all
IOExceptions too, and we catch IOExceptions anyways, we merge the
three catches into one, as they all do the same thing. Thereby, the
code gets clearer.

Change-Id: Ib76f237e227aeecc997c21ab99b2c31ec2e3f3d2
diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewersbyblame/ChangeUpdatedListener.java b/src/main/java/com/googlesource/gerrit/plugins/reviewersbyblame/ChangeUpdatedListener.java
index d21d5c3..e395747 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewersbyblame/ChangeUpdatedListener.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewersbyblame/ChangeUpdatedListener.java
@@ -36,8 +36,6 @@
 import com.google.inject.Provider;
 import com.google.inject.ProvisionException;
 
-import org.eclipse.jgit.errors.IncorrectObjectTypeException;
-import org.eclipse.jgit.errors.MissingObjectException;
 import org.eclipse.jgit.errors.RepositoryNotFoundException;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.Repository;
@@ -179,10 +177,6 @@
         });
       } catch (OrmException x) {
         log.error(x.getMessage(), x);
-      } catch (MissingObjectException x) {
-        log.error(x.getMessage(), x);
-      } catch (IncorrectObjectTypeException x) {
-        log.error(x.getMessage(), x);
       } catch (IOException x) {
         log.error(x.getMessage(), x);
       } finally {