egg: remove unused matrix_2d variable

panda/src/egg/parser.cxx.prebuilt

@@ -168,10 +168,6 @@ static Groups groups;
 // temporarily.
 static int vertex_index;
 
-// We need to hold a matrix for a little bit while parsing the
-// <Transform> entries.
-static LMatrix3d matrix_2d;
-
 
 ////////////////////////////////////////////////////////////////////
 // Defining the interface to the parser.

panda/src/egg/parser.yxx

@@ -98,10 +98,6 @@ static Groups groups;
 // temporarily.
 static int vertex_index;
 
-// We need to hold a matrix for a little bit while parsing the
-// <Transform> entries.
-static LMatrix3d matrix_2d;
-
 
 ////////////////////////////////////////////////////////////////////
 // Defining the interface to the parser.