patch 9.0.0491: no good reason to build without the float feature

Problem:    No good reason to build without the float feature.
Solution:   Remove configure check for float and "#ifdef FEAT_FLOAT".
diff --git a/src/vim9instr.c b/src/vim9instr.c
index 11e39f1..edc6cb6 100644
--- a/src/vim9instr.c
+++ b/src/vim9instr.c
@@ -208,9 +208,7 @@
 		      vartype == VAR_NUMBER ? ISN_OPNR
 		    : vartype == VAR_LIST ? ISN_ADDLIST
 		    : vartype == VAR_BLOB ? ISN_ADDBLOB
-#ifdef FEAT_FLOAT
 		    : vartype == VAR_FLOAT ? ISN_OPFLOAT
-#endif
 		    : ISN_OPANY, 1);
 
     if (vartype != VAR_LIST && vartype != VAR_BLOB
@@ -251,9 +249,7 @@
     if (type1->tt_type == type2->tt_type
 	    && (type1->tt_type == VAR_NUMBER
 		|| type1->tt_type == VAR_LIST
-#ifdef FEAT_FLOAT
 		|| type1->tt_type == VAR_FLOAT
-#endif
 		|| type1->tt_type == VAR_BLOB))
 	return type1->tt_type;
     return VAR_ANY;
@@ -293,10 +289,8 @@
 		      return FAIL;
 		  if (vartype == VAR_NUMBER)
 		      isn = generate_instr_drop(cctx, ISN_OPNR, 1);
-#ifdef FEAT_FLOAT
 		  else if (vartype == VAR_FLOAT)
 		      isn = generate_instr_drop(cctx, ISN_OPFLOAT, 1);
-#endif
 		  else
 		      isn = generate_instr_drop(cctx, ISN_OPANY, 1);
 		  if (isn != NULL)
@@ -326,12 +320,10 @@
     {
 	type_T *type = &t_any;
 
-#ifdef FEAT_FLOAT
 	// float+number and number+float results in float
 	if ((type1->tt_type == VAR_NUMBER || type1->tt_type == VAR_FLOAT)
-		&& (type2->tt_type == VAR_NUMBER || type2->tt_type == VAR_FLOAT))
+	      && (type2->tt_type == VAR_NUMBER || type2->tt_type == VAR_FLOAT))
 	    type = &t_float;
-#endif
 	set_type_on_stack(cctx, type, 0);
     }
 
@@ -580,11 +572,9 @@
 	case VAR_NUMBER:
 	    generate_PUSHNR(cctx, tv->vval.v_number);
 	    break;
-#ifdef FEAT_FLOAT
 	case VAR_FLOAT:
 	    generate_PUSHF(cctx, tv->vval.v_float);
 	    break;
-#endif
 	case VAR_BLOB:
 	    generate_PUSHBLOB(cctx, tv->vval.v_blob);
 	    tv->vval.v_blob = NULL;
@@ -688,7 +678,6 @@
     return OK;
 }
 
-#if defined(FEAT_FLOAT) || defined(PROTO)
 /*
  * Generate an ISN_PUSHF instruction.
  */
@@ -704,7 +693,6 @@
 
     return OK;
 }
-#endif
 
 /*
  * Generate an ISN_PUSHS instruction.