LfsGson: Remove unnecessary 'throws' declarations

JsonIOException and JsonSyntaxException are subclasses of
RuntimeException, so don't need to be explicitly specified.

Change-Id: I3ed07df4838ea38c0d6e5ab88f4d18907532862a

src/main/java/com/googlesource/gerrit/plugins/lfs/LfsGson.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsGson.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsGson.java
index 66398fe..f2af66e 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsGson.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsGson.java
@@ -17,8 +17,6 @@
 import com.google.gson.FieldNamingPolicy;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
-import com.google.gson.JsonIOException;
-import com.google.gson.JsonSyntaxException;
 import com.google.inject.Singleton;
 import java.io.Reader;
 
@@ -34,7 +32,7 @@
             .create();
   }
 
-  public void toJson(Object src, Appendable writer) throws JsonIOException {
+  public void toJson(Object src, Appendable writer) {
     gson.toJson(src, writer);
   }
 
@@ -42,8 +40,7 @@
     return gson.toJson(src);
   }
 
-  public <T> T fromJson(Reader json, Class<T> classOfT)
-      throws JsonSyntaxException, JsonIOException {
+  public <T> T fromJson(Reader json, Class<T> classOfT) {
     return gson.fromJson(json, classOfT);
   }
 }