diff --git a/eng/native/tryrun.cmake b/eng/native/tryrun.cmake
index a4cc7eaf93106f..18f37058f5ae54 100644
--- a/eng/native/tryrun.cmake
+++ b/eng/native/tryrun.cmake
@@ -59,7 +59,6 @@ if(DARWIN)
     set_cache_value(HAVE_CLOCK_THREAD_CPUTIME_EXITCODE 0)
     set_cache_value(HAVE_CLOCK_GETTIME_NSEC_NP_EXITCODE 0)
     set_cache_value(HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES_EXITCODE 1)
-    set_cache_value(HAVE_LARGE_SNPRINTF_SUPPORT_EXITCODE 0)
     set_cache_value(HAVE_MMAP_DEV_ZERO_EXITCODE 1)
     set_cache_value(HAVE_PROCFS_CTL_EXITCODE 1)
     set_cache_value(HAVE_PROCFS_STAT_EXITCODE 1)
@@ -73,7 +72,6 @@ if(DARWIN)
     set_cache_value(PTHREAD_CREATE_MODIFIES_ERRNO_EXITCODE 1)
     set_cache_value(REALPATH_SUPPORTS_NONEXISTENT_FILES_EXITCODE 1)
     set_cache_value(SEM_INIT_MODIFIES_ERRNO_EXITCODE 1)
-    set_cache_value(SSCANF_SUPPORT_ll_EXITCODE 0)
     set_cache_value(UNGETC_NOT_RETURN_EOF_EXITCODE 1)
     set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP_EXITCODE 1)
   else()
@@ -86,7 +84,6 @@ elseif(TARGET_ARCH_NAME MATCHES "^(armel|arm|armv6|arm64|loongarch64|riscv64|s39
   set_cache_value(HAVE_CLOCK_MONOTONIC_EXITCODE 0)
   set_cache_value(HAVE_CLOCK_REALTIME_EXITCODE 0)
   set_cache_value(HAVE_CLOCK_THREAD_CPUTIME_EXITCODE 0)
-  set_cache_value(HAVE_LARGE_SNPRINTF_SUPPORT_EXITCODE 0)
   set_cache_value(HAVE_MMAP_DEV_ZERO_EXITCODE 0)
   set_cache_value(HAVE_PROCFS_CTL_EXITCODE 1)
   set_cache_value(HAVE_PROCFS_STAT_EXITCODE 0)
@@ -103,11 +100,9 @@ elseif(TARGET_ARCH_NAME MATCHES "^(armel|arm|armv6|arm64|loongarch64|riscv64|s39
 
   if(ALPINE_LINUX)
     set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP_EXITCODE 1)
-    set_cache_value(SSCANF_SUPPORT_ll_EXITCODE 1)
     set_cache_value(UNGETC_NOT_RETURN_EOF_EXITCODE 1)
   else()
     set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP_EXITCODE 0)
-    set_cache_value(SSCANF_SUPPORT_ll_EXITCODE 0)
     set_cache_value(UNGETC_NOT_RETURN_EOF_EXITCODE 0)
   endif()
 
@@ -121,9 +116,7 @@ elseif(TARGET_ARCH_NAME MATCHES "^(armel|arm|armv6|arm64|loongarch64|riscv64|s39
     set_cache_value(UNGETC_NOT_RETURN_EOF 0)
     set_cache_value(HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES_EXITCODE 0)
   elseif(ILLUMOS)
-    set_cache_value(HAVE_LARGE_SNPRINTF_SUPPORT_EXITCODE 1)
     set_cache_value(HAVE_PROCFS_CTL_EXITCODE 0)
-    set_cache_value(SSCANF_SUPPORT_ll_EXITCODE 1)
     set_cache_value(UNGETC_NOT_RETURN_EOF_EXITCODE 0)
     set_cache_value(COMPILER_SUPPORTS_W_CLASS_MEMACCESS 1)
     set_cache_value(HAVE_SET_MAX_VARIABLE 1)
diff --git a/eng/native/tryrun_ios_tvos.cmake b/eng/native/tryrun_ios_tvos.cmake
index e3dfeb62780b30..59b496ddfafa7c 100644
--- a/eng/native/tryrun_ios_tvos.cmake
+++ b/eng/native/tryrun_ios_tvos.cmake
@@ -18,7 +18,6 @@ set_cache_value(HAVE_CLOCK_REALTIME_EXITCODE 0)
 set_cache_value(HAVE_CLOCK_THREAD_CPUTIME_EXITCODE 0)
 set_cache_value(HAVE_CLOCK_GETTIME_NSEC_NP_EXITCODE 0)
 set_cache_value(HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES_EXITCODE 1)
-set_cache_value(HAVE_LARGE_SNPRINTF_SUPPORT_EXITCODE 0)
 set_cache_value(HAVE_MMAP_DEV_ZERO_EXITCODE 1)
 set_cache_value(HAVE_PROCFS_CTL_EXITCODE 1)
 set_cache_value(HAVE_PROCFS_STAT_EXITCODE 1)
@@ -31,6 +30,5 @@ set_cache_value(ONE_SHARED_MAPPING_PER_FILEREGION_PER_PROCESS_EXITCODE 1)
 set_cache_value(PTHREAD_CREATE_MODIFIES_ERRNO_EXITCODE 1)
 set_cache_value(REALPATH_SUPPORTS_NONEXISTENT_FILES_EXITCODE 1)
 set_cache_value(SEM_INIT_MODIFIES_ERRNO_EXITCODE 1)
-set_cache_value(SSCANF_SUPPORT_ll_EXITCODE 0)
 set_cache_value(UNGETC_NOT_RETURN_EOF_EXITCODE 1)
 set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP_EXITCODE 1)
diff --git a/src/coreclr/pal/src/config.h.in b/src/coreclr/pal/src/config.h.in
index aba4249541b434..1c4f815c8f8147 100644
--- a/src/coreclr/pal/src/config.h.in
+++ b/src/coreclr/pal/src/config.h.in
@@ -99,8 +99,6 @@
 #cmakedefine01 HAVE__SC_AVPHYS_PAGES
 
 #cmakedefine01 REALPATH_SUPPORTS_NONEXISTENT_FILES
-#cmakedefine01 SSCANF_SUPPORT_ll
-#cmakedefine01 HAVE_LARGE_SNPRINTF_SUPPORT
 #cmakedefine01 HAVE_BROKEN_FIFO_SELECT
 #cmakedefine01 HAVE_BROKEN_FIFO_KEVENT
 #cmakedefine01 HAS_FTRUNCATE_LENGTH_ISSUE
diff --git a/src/coreclr/pal/src/configure.cmake b/src/coreclr/pal/src/configure.cmake
index ed730378074c3c..c6b70fb8b02114 100644
--- a/src/coreclr/pal/src/configure.cmake
+++ b/src/coreclr/pal/src/configure.cmake
@@ -211,27 +211,6 @@ int main(void) {
 check_cxx_source_runs("
 #include <stdio.h>
 #include <stdlib.h>
-int main(void)
-{
-  long long n = 0;
-  sscanf(\"5000000000\", \"%qu\", &n);
-  exit (n != 5000000000);
-  }" SSCANF_SUPPORT_ll)
-check_cxx_source_runs("
-#include <stdio.h>
-#include <stdlib.h>
-
-int main(void) {
-  char buf[256] = { 0 };
-  snprintf(buf, 0x7fffffff, \"%#x\", 0x12345678);
-  if (buf[0] == 0x0) {
-    exit(1);
-  }
-  exit(0);
-}" HAVE_LARGE_SNPRINTF_SUPPORT)
-check_cxx_source_runs("
-#include <stdio.h>
-#include <stdlib.h>
 #include <fcntl.h>
 #include <string.h>
 #include <sys/stat.h>