patch 8.1.1306: Borland support is outdated and doesn't work

Problem:    Borland support is outdated and doesn't work.
Solution:   Remove Borland support, there are other (free) compilers
            available. (Thomas Dziedzic, Ken Takata, closes #4364)
diff --git a/src/misc2.c b/src/misc2.c
index 3ef7c94..f9f6bf5 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -3912,16 +3912,9 @@
 /*
  * Sort an array of strings.
  */
-static int
-#ifdef __BORLANDC__
-_RTLENTRYF
-#endif
-sort_compare(const void *s1, const void *s2);
+static int sort_compare(const void *s1, const void *s2);
 
     static int
-#ifdef __BORLANDC__
-_RTLENTRYF
-#endif
 sort_compare(const void *s1, const void *s2)
 {
     return STRCMP(*(char **)s1, *(char **)s2);