Remove declarations of unthrown exceptions

Change-Id: I5948ad00a2f551b12d67d9633cf00244b3ebffec

github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthGitWrappedResponse.java

diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthGitWrappedResponse.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthGitWrappedResponse.java
index 9b046cf..947d931 100644
--- a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthGitWrappedResponse.java
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthGitWrappedResponse.java
@@ -44,7 +44,7 @@
     super.sendError(sc, msg);
   }
 
-  private void requestBasicAuthenticationHandshake() throws IOException {
+  private void requestBasicAuthenticationHandshake() {
     setStatus(SC_UNAUTHORIZED);
     StringBuilder v = new StringBuilder();
     v.append(GIT_AUTHENTICATION_BASIC);

github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthWebFilter.java

diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthWebFilter.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthWebFilter.java
index d11745e..cde4fbf 100644
--- a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthWebFilter.java
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthWebFilter.java
@@ -131,7 +131,7 @@
 
   private ServletResponse logout(ServletRequest request,
       ServletResponse response, FilterChain chain,
-      HttpServletRequest httpRequest) throws IOException, ServletException {
+      HttpServletRequest httpRequest) {
     getGitHubLogin(request).logout();
     return new GitHubLogoutServletResponse((HttpServletResponse) response,
         config.logoutRedirectUrl);