Namespace doesn't need to be followed by semicolon

Summary:
Auto-generated with
```
fbgs "}; // namespace" -l | sort | uniq | sed 's/fbsource.//' | xargs -n 50 sed -i 's_}; // namespace_} // namespace_'
```

Reviewed By: dmm-fb

Differential Revision: D51029740

fbshipit-source-id: 177e3f6e6b0ab7e986b1147952cd5e2f59d4b1fc

faiss/Clustering.cpp

@@ -250,7 +250,7 @@ int split_clusters(
  return nsplit;
 }
 
-}; // namespace
+} // namespace
 
 void Clustering::train_encoded(
  idx_t nx,
@@ -617,7 +617,7 @@ void copy_columns(idx_t n, idx_t d1, const float* src, idx_t d2, float* dest) {
  }
 }
 
-}; // namespace
+} // namespace
 
 void ProgressiveDimClustering::train(
  idx_t n,

faiss/IndexIVFSpectralHash.cpp

@@ -157,7 +157,7 @@ void binarize_with_freq(
  }
 }
 
-}; // namespace
+} // namespace
 
 void IndexIVFSpectralHash::encode_vectors(
  idx_t n,

faiss/impl/AdditiveQuantizer.h

@@ -203,4 +203,4 @@ struct AdditiveQuantizer : Quantizer {
  virtual ~AdditiveQuantizer();
 };
 
-}; // namespace faiss
+} // namespace faiss

faiss/impl/ProductAdditiveQuantizer.h

@@ -151,4 +151,4 @@ struct ProductResidualQuantizer : ProductAdditiveQuantizer {
  ProductResidualQuantizer();
 };
 
-}; // namespace faiss
+} // namespace faiss

faiss/impl/ResidualQuantizer.h

@@ -155,4 +155,4 @@ struct ResidualQuantizer : AdditiveQuantizer {
  std::vector<float> cent_norms;
 };
 
-}; // namespace faiss
+} // namespace faiss

faiss/invlists/InvertedLists.cpp

@@ -437,7 +437,7 @@ idx_t translate_list_no(const SliceInvertedLists* sil, idx_t list_no) {
  return list_no + sil->i0;
 }
 
-}; // namespace
+} // namespace
 
 SliceInvertedLists::SliceInvertedLists(
  const InvertedLists* il,
@@ -522,7 +522,7 @@ idx_t sum_il_sizes(int nil, const InvertedLists** ils_in) {
  return tot;
 }
 
-}; // namespace
+} // namespace
 
 VStackInvertedLists::VStackInvertedLists(int nil, const InvertedLists** ils_in)
  : ReadOnlyInvertedLists(

faiss/python/python_callbacks.cpp

@@ -22,7 +22,7 @@ struct PyThreadLock {
  }
 };
 
-}; // namespace
+} // namespace
 
 /***********************************************************
  * Callbacks for IO reader and writer

faiss/utils/sorting.cpp

@@ -123,7 +123,7 @@ void parallel_merge(
  }
 }
 
-}; // namespace
+} // namespace
 
 void fvec_argsort(size_t n, const float* vals, size_t* perm) {
  for (size_t i = 0; i < n; i++) {