remove extra adjustments to textEdit for CDD

[browntarik]

Addresses: #10500, #10464

This change removes the adjustments that were previously added to account for two text edits.

[browntarik]

Existing Known Issue:

For the scenario where a user generates a definition in a source file with no #include with an existing namespace and another existing function that is declared in the header file it will misplace the definition due to miscalculation of neighboring functions.

example.cpp

namespace uniqueName {
int GlobalFunction3()
{
return 0;
}
}

example.h

#pragma once
namespace uniqueName {
int GlobalFunction2();
int GlobalFunction3();
template
int GlobalFunction5();
}
We will check this in because the scenario is unlikely. Otherwise, testing shows the change works out.