Bug 1765474 - Fix unused-but-set-variable warnings in netwerk/. r=necko-reviewers,dragana

netwerk/protocol/http/Http2Compression.cpp:326:12: error: variable 'removedCount' set but not used [-Werror,-Wunused-but-set-variable]
  uint32_t removedCount = 0;
           ^
netwerk/streamconv/converters/nsDirIndexParser.cpp:376:11: error: variable 'numItems' set but not used [-Werror,-Wunused-but-set-variable]
  int32_t numItems = 0;
          ^

Differential Revision: https://phabricator.services.mozilla.com/D144144

netwerk/protocol/http/Http2Compression.cpp

@@ -323,15 +323,12 @@ void Http2BaseCompressor::DumpState(const char* preamble) {
 void Http2BaseCompressor::SetMaxBufferSizeInternal(uint32_t maxBufferSize) {
   MOZ_ASSERT(maxBufferSize <= mMaxBufferSetting);
 
-  uint32_t removedCount = 0;
-
   LOG(("Http2BaseCompressor::SetMaxBufferSizeInternal %u called",
        maxBufferSize));
 
   while (mHeaderTable.VariableLength() &&
          (mHeaderTable.ByteCount() > maxBufferSize)) {
     mHeaderTable.RemoveElement();
-    ++removedCount;
   }
 
   mMaxBuffer = maxBufferSize;

netwerk/streamconv/converters/nsDirIndexParser.cpp

@@ -373,11 +373,7 @@ nsDirIndexParser::OnDataAvailable(nsIRequest* aRequest, nsIInputStream* aStream,
 nsresult nsDirIndexParser::ProcessData(nsIRequest* aRequest) {
   if (!mListener) return NS_ERROR_FAILURE;
 
-  int32_t numItems = 0;
-
   while (true) {
-    ++numItems;
-
     int32_t eol = mBuf.FindCharInSet("\n\r", mLineStart);
     if (eol < 0) break;
     mBuf.SetCharAt(char16_t('\0'), eol);