Include gmp.h before flint/fmpz.h

Required for certain FLINT functions that use GMP since FLINT 3.2.0

We actually include M2/math-include.h, which includes gmp.h.

Also remove some redundant includes of gmp.h from other files in the e
directory.

Author: d-torrance

M2/Macaulay2/e/NCAlgebras/FreeAlgebra.hpp

@@ -9,7 +9,6 @@
 #include "ringelem.hpp"               // for ring_elem
 #include "style.hpp"                  // for GEOHEAP_SIZE
 
-#include <gmp.h>                      // for mpz_srcptr, mpq_srcptr
 #include <iosfwd>                     // for ostream, string
 #include <utility>                    // for pair
 #include <vector>                     // for vector

M2/Macaulay2/e/NCAlgebras/FreeAlgebraQuotient.hpp

@@ -8,7 +8,6 @@
 #include "newdelete.hpp"              // for our_new_delete
 #include "ringelem.hpp"               // for ring_elem
 
-#include <gmp.h>                      // for mpz_srcptr, mpq_srcptr
 #include <vector>                     // for vector
 
 class Ring;

M2/Macaulay2/e/aring-gf-flint-big.hpp

@@ -8,6 +8,9 @@
 // The following needs to be included before any flint files are included.
 #include <M2/gc-include.h>
 
+// includes gmp.h, which is required for FLINT functions that use GMP
+#include <M2/math-include.h>
+
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
 #include <flint/flint.h>       // for flint_free, flint_rand_t, fmpz_t

M2/Macaulay2/e/aring-gf-flint.hpp

@@ -8,6 +8,9 @@
 // The following needs to be included before any flint files are included.
 #include <M2/gc-include.h>
 
+// includes gmp.h, which is required for FLINT functions that use GMP
+#include <M2/math-include.h>
+
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
 #include <flint/flint.h>      // for flint_rand_t, fmpz_t, ulong

M2/Macaulay2/e/schreyer-resolution/res-f4-m2-interface.cpp

@@ -33,7 +33,6 @@
 #include "schreyer-resolution/res-schreyer-frame.hpp"     // for SchreyerFrame
 #include "schreyer-resolution/res-schreyer-order.hpp"     // for ResSchreyer...
 #include "timing.hpp"                                     // for timer, seconds
-#include <gmp.h>                                          // for mpz_clear
 #include <cstdlib>                                        // for exit, size_t
 #include <chrono>                                         // for common_type...
 #include <iostream>                                       // for operator<<