gh-38669: Remove giac integration from GiNaC
    
Phase one of #38668

AFAICS it's not doing anything anyway.
    
URL: #38669
Reported by: Michael Orlitzky
Reviewer(s):

Author: Release Manager

src/sage/symbolic/expression.pyx

@@ -1,4 +1,4 @@
-# distutils: sources = sage/symbolic/ginac/add.cpp sage/symbolic/ginac/archive.cpp sage/symbolic/ginac/assume.cpp sage/symbolic/ginac/basic.cpp sage/symbolic/ginac/cmatcher.cpp sage/symbolic/ginac/constant.cpp sage/symbolic/ginac/context.cpp sage/symbolic/ginac/ex.cpp sage/symbolic/ginac/expair.cpp sage/symbolic/ginac/expairseq.cpp sage/symbolic/ginac/exprseq.cpp sage/symbolic/ginac/fderivative.cpp sage/symbolic/ginac/function.cpp sage/symbolic/ginac/function_info.cpp sage/symbolic/ginac/infinity.cpp sage/symbolic/ginac/infoflagbase.cpp sage/symbolic/ginac/inifcns.cpp sage/symbolic/ginac/inifcns_comb.cpp sage/symbolic/ginac/inifcns_gamma.cpp sage/symbolic/ginac/inifcns_hyperb.cpp sage/symbolic/ginac/inifcns_hyperg.cpp sage/symbolic/ginac/inifcns_nstdsums.cpp sage/symbolic/ginac/inifcns_orthopoly.cpp sage/symbolic/ginac/inifcns_trans.cpp sage/symbolic/ginac/inifcns_trig.cpp sage/symbolic/ginac/inifcns_zeta.cpp sage/symbolic/ginac/lst.cpp sage/symbolic/ginac/matrix.cpp sage/symbolic/ginac/mpoly-giac.cpp sage/symbolic/ginac/mpoly-ginac.cpp sage/symbolic/ginac/mpoly-singular.cpp sage/symbolic/ginac/mpoly.cpp sage/symbolic/ginac/mul.cpp sage/symbolic/ginac/normal.cpp sage/symbolic/ginac/numeric.cpp sage/symbolic/ginac/operators.cpp sage/symbolic/ginac/order.cpp sage/symbolic/ginac/power.cpp sage/symbolic/ginac/print.cpp sage/symbolic/ginac/pseries.cpp sage/symbolic/ginac/py_funcs.cpp sage/symbolic/ginac/registrar.cpp sage/symbolic/ginac/relational.cpp sage/symbolic/ginac/remember.cpp sage/symbolic/ginac/sum.cpp sage/symbolic/ginac/symbol.cpp sage/symbolic/ginac/templates.cpp sage/symbolic/ginac/upoly-ginac.cpp sage/symbolic/ginac/useries.cpp sage/symbolic/ginac/utils.cpp sage/symbolic/ginac/wildcard.cpp
+# distutils: sources = sage/symbolic/ginac/add.cpp sage/symbolic/ginac/archive.cpp sage/symbolic/ginac/assume.cpp sage/symbolic/ginac/basic.cpp sage/symbolic/ginac/cmatcher.cpp sage/symbolic/ginac/constant.cpp sage/symbolic/ginac/context.cpp sage/symbolic/ginac/ex.cpp sage/symbolic/ginac/expair.cpp sage/symbolic/ginac/expairseq.cpp sage/symbolic/ginac/exprseq.cpp sage/symbolic/ginac/fderivative.cpp sage/symbolic/ginac/function.cpp sage/symbolic/ginac/function_info.cpp sage/symbolic/ginac/infinity.cpp sage/symbolic/ginac/infoflagbase.cpp sage/symbolic/ginac/inifcns.cpp sage/symbolic/ginac/inifcns_comb.cpp sage/symbolic/ginac/inifcns_gamma.cpp sage/symbolic/ginac/inifcns_hyperb.cpp sage/symbolic/ginac/inifcns_hyperg.cpp sage/symbolic/ginac/inifcns_nstdsums.cpp sage/symbolic/ginac/inifcns_orthopoly.cpp sage/symbolic/ginac/inifcns_trans.cpp sage/symbolic/ginac/inifcns_trig.cpp sage/symbolic/ginac/inifcns_zeta.cpp sage/symbolic/ginac/lst.cpp sage/symbolic/ginac/matrix.cpp sage/symbolic/ginac/mpoly-ginac.cpp sage/symbolic/ginac/mpoly-singular.cpp sage/symbolic/ginac/mpoly.cpp sage/symbolic/ginac/mul.cpp sage/symbolic/ginac/normal.cpp sage/symbolic/ginac/numeric.cpp sage/symbolic/ginac/operators.cpp sage/symbolic/ginac/order.cpp sage/symbolic/ginac/power.cpp sage/symbolic/ginac/print.cpp sage/symbolic/ginac/pseries.cpp sage/symbolic/ginac/py_funcs.cpp sage/symbolic/ginac/registrar.cpp sage/symbolic/ginac/relational.cpp sage/symbolic/ginac/remember.cpp sage/symbolic/ginac/sum.cpp sage/symbolic/ginac/symbol.cpp sage/symbolic/ginac/templates.cpp sage/symbolic/ginac/upoly-ginac.cpp sage/symbolic/ginac/useries.cpp sage/symbolic/ginac/utils.cpp sage/symbolic/ginac/wildcard.cpp
 # distutils: language = c++
 # distutils: libraries = flint gmp SINGULAR_LIBRARIES
 # distutils: extra_compile_args = -std=c++11 SINGULAR_CFLAGS

src/sage/symbolic/ginac/basic.h

@@ -43,19 +43,6 @@ struct _object;
 typedef _object PyObject;
 #endif
 
-#ifdef PYNAC_HAVE_LIBGIAC
-namespace giac
-{
-        class gen;
-        template <class T> class tensor;
-        typedef class tensor<gen> polynome;
-}
-namespace GiNaC
-{
-struct ex_is_less;
-}
-#endif
-
 namespace GiNaC {
 
 class ex;
@@ -315,9 +302,6 @@ class basic : public refcounted
 	const basic & clearflag(unsigned f) const {flags &= ~f; return *this;}
 
 	void ensure_if_modifiable() const;
-#ifdef PYNAC_HAVE_LIBGIAC
-        const giac::polynome to_polynome(ex_int_map& map, exvector& revmap);
-#endif
 
 	// member variables
 	tinfo_t tinfo_key;                  ///< type info

src/sage/symbolic/ginac/ex.h

@@ -230,9 +230,6 @@ class ex {
 	ex to_rational(lst & repl_lst) const;
 	ex to_polynomial(exmap & repl) const;
 	ex to_polynomial(lst & repl_lst) const;
-#ifdef PYNAC_HAVE_LIBGIAC
-        const giac::polynome to_polynome(ex_int_map& map, exvector& revmap) const;
-#endif
         const CanonicalForm to_canonical(ex_int_umap& map,
                         power_ocvector_map& pomap, exvector& revmap) const;
         void collect_powers(power_ocvector_map& pomap) const;