Internals: Remove some unnecessary typedefs. No functional change.

src/V3LifePost.cpp

@@ -150,8 +150,7 @@ private:
     LocMap m_writes;  // VarScope write locations
 
     // Map each dly var to its AstAssignPost* node and the location thereof
-    typedef std::unordered_map<const AstVarScope*, LifePostLocation> PostLocMap;
-    PostLocMap m_assignposts;  // AssignPost dly var locations
+    std::unordered_map<const AstVarScope*, LifePostLocation> m_assignposts;
 
     const V3Graph* m_mtasksGraphp = nullptr;  // Mtask tracking graph
     std::unique_ptr<GraphPathChecker> m_checker;