maint: Remove unused variables. * data.cc (Fissorted): Remove "octave_value mode_arg". * error.cc (Ferror): Remove "octave_value_list tmp". * gl2ps-renderer.cc (gl2ps_renderer::draw_text): Comment out "Matrix bbox". * graphics.cc (base_properties::get_dynamic): Remove "octave_value retval". * graphics.cc (Faddproperty): Remove "octave_value retval". * regexp.cc (octregexprep): Remove "octave_value retval". * sparse-xpow.cc (elem_xpow): Remove "Complex tmp". * symtab.cc (symbol_table::fcn_info::fcn_info_rep::find_autoload): Remove "octave_value retval". * urlwrite.cc (__ftp_mode__): Remove "octave_value retval". * xpow.cc (xpow (const DiagMatrix& a, double b)): Remove "octave_value retval". * symrcm.cc (Fsymrcm): Remove "octave_value retval". * ov-cell.cc (Fcellstr): Remove "octave_value retval". * ov-classdef.cc (cdef_object::map_value): Remove "octave_value pvalue". * ov-struct.cc (octave_scalar_struct::load_binary): Remove "dim_vector dv (1, 1)" * ov-struct.cc (Fstruct): Remove "Cell fields" ov.cc (octave_value::assign): Remove "octave_value retval". * pt-classdef.cc (tree_classdef_body::~tree_classdef_body): Remove "octave_value retval". * pt-eval.cc (tree_evaluator::visit_statement_list): Comment out "static octave_value_list empty_list". * DASRT.cc (DASRT::integrate): Remove "DASRT_result retval". * sparse-base-chol.cc (sparse_base_chol<>): Remove "chol_type ret".

--- a/libinterp/octave-value/ov.cc	Wed Jan 20 16:58:59 2016 -0800
+++ b/libinterp/octave-value/ov.cc	Wed Jan 20 20:57:45 2016 -0800
@@ -1412,8 +1412,6 @@
                       const std::list<octave_value_list>& idx,
                       const octave_value& rhs)
 {
-  octave_value retval;
-
   make_unique ();
 
   octave_value t_rhs = rhs;