diff --git a/include/ceres/codegen/internal/expression_ref.h b/include/ceres/codegen/internal/expression_ref.h
index 1bdc3b5..5a13d76 100644
--- a/include/ceres/codegen/internal/expression_ref.h
+++ b/include/ceres/codegen/internal/expression_ref.h
@@ -33,6 +33,7 @@
 #define CERES_PUBLIC_EXPRESSION_REF_H_
 
 #include <string>
+
 #include "ceres/codegen/internal/expression.h"
 #include "ceres/codegen/internal/types.h"
 
@@ -86,23 +87,6 @@
   ExpressionRef(const ExpressionRef& other);
   ExpressionRef& operator=(const ExpressionRef& other);
 
-  // Similar to the copy assignment above, but if 'this' is uninitialized, we
-  // can remove the copy and therefore eliminate one expression in the graph.
-  // For example:
-  //   T c;
-  //   c = a + b;
-  // will generate
-  //   v_2 = v_0 + v_1
-  // instead of an additional assigment from the temporary 'a + b' to 'c'. In
-  // C++ this concept is called "Copy Elision". This is used by the compiler to
-  // eliminate copies, for example, in a function that returns an object by
-  // value. We implement it ourself here, because large parts of copy elision
-  // are implementation defined, which means that every compiler can do it
-  // differently. More information on copy elision can be found here:
-  // https://en.cppreference.com/w/cpp/language/copy_elision
-  ExpressionRef(ExpressionRef&& other);
-  ExpressionRef& operator=(ExpressionRef&& other);
-
   // Compound operators
   ExpressionRef& operator+=(const ExpressionRef& x);
   ExpressionRef& operator-=(const ExpressionRef& x);
diff --git a/internal/ceres/codegen/expression_ref_test.cc b/internal/ceres/codegen/expression_ref_test.cc
index 30672ad..0a70d42 100644
--- a/internal/ceres/codegen/expression_ref_test.cc
+++ b/internal/ceres/codegen/expression_ref_test.cc
@@ -34,6 +34,7 @@
 #define CERES_CODEGEN
 
 #include "ceres/codegen/internal/expression_ref.h"
+
 #include "ceres/codegen/internal/expression_graph.h"
 #include "gtest/gtest.h"
 
@@ -112,18 +113,6 @@
   EXPECT_EQ(reference, graph);
 }
 
-TEST(ExpressionRef, MoveAssignmentCreate) {
-  StartRecordingExpressions();
-  T a = 2;
-  T b = std::move(a);
-  auto graph = StopRecordingExpressions();
-  EXPECT_EQ(graph.Size(), 1);
-
-  ExpressionGraph reference;
-  reference.InsertBack(Expression::CreateCompileTimeConstant(2));
-  EXPECT_EQ(reference, graph);
-}
-
 TEST(ExpressionRef, MoveAssignment) {
   StartRecordingExpressions();
   T a = 1;
diff --git a/internal/ceres/expression_ref.cc b/internal/ceres/expression_ref.cc
index 52b7e0b..dda412a 100644
--- a/internal/ceres/expression_ref.cc
+++ b/internal/ceres/expression_ref.cc
@@ -76,41 +76,6 @@
   return *this;
 }
 
-ExpressionRef::ExpressionRef(ExpressionRef&& other) {
-  *this = std::move(other);
-}
-
-ExpressionRef& ExpressionRef::operator=(ExpressionRef&& other) {
-  // Assigning an uninitialized variable to another variable is an error.
-  CHECK(other.IsInitialized()) << "Uninitialized Assignment.";
-
-  if (IsInitialized()) {
-    // Create assignment from other -> this
-    AddExpressionToGraph(Expression::CreateAssignment(id, other.id));
-  } else {
-    // Special case: 'this' is uninitialized and other is an rvalue.
-    //    -> Implement copy elision by only setting the reference
-    // This reduces the number of generated expressions roughly by a factor
-    // of 2. For example, in the following statement:
-    //   T c = a + b;
-    // The result of 'a + b' is an rvalue reference to ExpressionRef.
-    // Therefore, the move constructor of 'c' is called. Since 'c' is also
-    // uninitialized, this branch here is taken and the copy is removed. After
-    // this function 'c' will just point to the temporary created by the 'a +
-    // b' expression. This is valid, because we don't have any scoping
-    // information and therefore assume global scope for all temporary
-    // variables. The generated code for the single statement above, is:
-    //   v_2 = v_0 + v_1;   // With c.id = 2
-    // Without this move constructor the following two lines would be
-    // generated:
-    //   v_2 = v_0 + v_1;
-    //   v_3 = v_2;        // With c.id = 3
-    id = other.id;
-  }
-  other.id = kInvalidExpressionId;
-  return *this;
-}
-
 // Compound operators
 ExpressionRef& ExpressionRef::operator+=(const ExpressionRef& x) {
   *this = *this + x;