Private method does not throw checked exception

- Remove those from the private method signatures

Author: garydgregory

httpcore5-h2/src/main/java/org/apache/hc/core5/http2/impl/nio/AbstractH2StreamMultiplexer.java

@@ -1145,7 +1145,7 @@ private void consumeContinuationFrame(final RawFrame frame, final H2Stream strea
         }
     }
 
-    private void consumeSettingsFrame(final ByteBuffer payload) throws HttpException, IOException {
+    private void consumeSettingsFrame(final ByteBuffer payload) throws IOException {
         final H2Config.Builder configBuilder = H2Config.initial();
         while (payload.hasRemaining()) {
             final int code = payload.getShort();

httpcore5/src/main/java/org/apache/hc/core5/http/impl/nio/ServerHttp1StreamHandler.java

@@ -297,7 +297,7 @@ boolean isOutputReady() {
         }
     }
 
-    void produceOutput() throws HttpException, IOException {
+    void produceOutput() throws IOException {
         switch (responseState) {
             case BODY:
                 exchangeHandler.produce(internalDataChannel);