remove warning supression

No longer relevant.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/jp2image.cpp

@@ -582,12 +582,6 @@ void Jp2Image::writeMetadata() {
 
 }  // Jp2Image::writeMetadata
 
-#ifdef __clang__
-// ignore cast align errors.  dataBuf.pData_ is allocated by malloc() and 4 (or 8 byte aligned).
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wcast-align"
-#endif
-
 void Jp2Image::encodeJp2Header(const DataBuf& boxBuf, DataBuf& outBuf) {
   DataBuf output(boxBuf.size() + iccProfile_.size() + 100);  // allocate sufficient space
   size_t outlen = boxHSize;                                  // now many bytes have we written to output?
@@ -659,10 +653,6 @@ void Jp2Image::encodeJp2Header(const DataBuf& boxBuf, DataBuf& outBuf) {
   ul2Data(outBuf.data(4), kJp2BoxTypeHeader, bigEndian);
 }
 
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
-
 void Jp2Image::doWriteMetadata(BasicIo& outIo) {
   if (!io_->isopen())
     throw Error(ErrorCode::kerInputDataReadFailed);