Remove obsolete check for missing fclose declaration

SunOS 4.1.4 from 1994 didn't have fclose declared in standard header
stdio.h. This doesn't need to be checked anymore, as fclose is part of
the C89+ standard and declaration is present on Solaris 10 (SunOS 5.10)
and later.

Author: petk

UPGRADING.INTERNALS

@@ -61,6 +61,7 @@ PHP 8.4 INTERNALS UPGRADE NOTES
    - Symbol HAVE_JSON has been removed (ext/json is always available since PHP
      8.0).
    - Symbol DARWIN has been removed (use __APPLE__ to target Darwin systems).
+   - Symbol MISSING_FCLOSE_DECL and m4 macro PHP_MISSING_FCLOSE_DECL removed.
 
  c. Windows build system changes
    - The configure options --with-oci8-11g, --with-oci8-12c, --with-oci8-19 have

build/php.m4

@@ -1286,22 +1286,6 @@ if test "$ac_cv_struct_flock" = "yes" ; then
 fi
 ])
 
-dnl
-dnl PHP_MISSING_FCLOSE_DECL
-dnl
-dnl See if we have broken header files like SunOS has.
-dnl
-AC_DEFUN([PHP_MISSING_FCLOSE_DECL],[
-  AC_MSG_CHECKING([for fclose declaration])
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[int (*func)() = fclose]])],[
-    AC_DEFINE(MISSING_FCLOSE_DECL,0,[ ])
-    AC_MSG_RESULT([ok])
-  ],[
-    AC_DEFINE(MISSING_FCLOSE_DECL,1,[ ])
-    AC_MSG_RESULT([missing])
-  ])
-])
-
 dnl
 dnl PHP_SOCKADDR_CHECKS
 dnl

configure.ac

@@ -464,7 +464,6 @@ dnl ----------------------------------------------------------------------------
 AC_STRUCT_TIMEZONE
 
 PHP_MISSING_TIME_R_DECL
-PHP_MISSING_FCLOSE_DECL
 PHP_STRUCT_FLOCK
 
 AC_CHECK_TYPES(socklen_t, [], [], [

ext/standard/file.c

@@ -86,10 +86,6 @@
 # include <sys/file.h>
 #endif
 
-#if MISSING_FCLOSE_DECL
-extern int fclose(FILE *);
-#endif
-
 #ifdef HAVE_SYS_MMAN_H
 # include <sys/mman.h>
 #endif