Remove a line that was left in from drafting

Author: rjmccall

abi.html

@@ -760,8 +760,6 @@ <h4><a href="#data-member-pointers"> 2.3.1 Data Member Pointers </a></h4>
     // The offset in D of the B3 base subobject is 2, but the
     // offset of the data member b is 1.
     auto mptr = static_cast<char B3::*>(&D::b);
-    
-    char B::*mptr = static_cast<char B::*>(static_cast<char C::*>(&A::a));
 </pre>
 
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