Remove duplicate dead branch elim pass declaration

The function had two declarations in the same header with somewhat
different comments.

diff --git a/include/spirv-tools/optimizer.hpp b/include/spirv-tools/optimizer.hpp
index 54e156172c94aba7eec5450974e81cda72857a6d..7e1db2528392dee175a4e2812f71a37769877663 100644 (file)
--- a/include/spirv-tools/optimizer.hpp
+++ b/include/spirv-tools/optimizer.hpp
@@ -260,6 +260,9 @@ Optimizer::PassToken CreateLocalSingleBlockLoadStoreElimPass();
 // BranchConditionals with constant condition and convert to a Branch to
 // the indicated label. It will delete resulting dead blocks.
 //
+// For all phi functions in merge block, replace all uses with the id
+// corresponding to the living predecessor.
+//
 // This pass only works on shaders (guaranteed to have structured control
 // flow). Note that some such branches and blocks may be left to avoid
 // creating invalid control flow. Improving this is left to future work.
@@ -333,17 +336,6 @@ Optimizer::PassToken CreateLocalSingleStoreElimPass();
 // converted to inserts and extracts and local loads and stores are eliminated.
 Optimizer::PassToken CreateInsertExtractElimPass();
 
-// Create dead branch elimination pass.
-// For each entry point function, this pass will look for BranchConditionals
-// with constant condition and convert to a branch. The BranchConditional must
-// be preceeded by OpSelectionMerge. For all phi functions in merge block,
-// replace all uses with the id corresponding to the living predecessor.
-//
-// This pass is most effective when preceeded by passes which eliminate
-// local loads and stores, effectively propagating constant values where
-// possible.
-Optimizer::PassToken CreateDeadBranchElimPass();
-
 // Creates a pass to consolidate uniform references.
 // For each entry point function in the module, first change all constant index
 // access chain loads into equivalent composite extracts. Then consolidate